Scrapie

Scrapie is a fatal, degenerative neurological disease affecting sheep and goats that belongs to a group of diseases known as transmissible spongiform encephalopathies. This devastating condition is caused by abnormal proteins called prions that accumulate in the brain and nervous system tissue, leading to progressive neurological deterioration and ultimately death. The disease gets its name from the characteristic behavior of affected animals scraping their fleece or hair against fences, trees, and other objects due to intense itching sensations caused by nervous system damage. Scrapie has been recognized for over 250 years and remains one of the most concerning diseases in small ruminant production due to its invariably fatal outcome and the challenges associated with its control.

Scrapie affects both sheep and goats worldwide, though historically it has been more commonly reported in sheep populations. The disease occurs in goats of all ages, though clinical signs typically manifest in adult animals between two and five years of age due to the extremely long incubation period characteristic of prion diseases. Prevalence varies significantly by geographic region and is heavily influenced by national eradication programs, genetic selection efforts, and biosecurity practices implemented at the farm level. Countries with aggressive eradication programs have significantly reduced or eliminated the disease, while it remains endemic in regions where control measures are less stringent or resources for monitoring are limited.

The economic and welfare impact of scrapie extends far beyond the loss of individual animals to the disease. Infected flocks and herds face significant movement restrictions, quarantine requirements, and potential depopulation orders that can devastate farming operations financially and emotionally. International trade restrictions on live animals and genetic material from countries or regions where scrapie is present create additional economic burdens on the entire small ruminant industry. The welfare implications are severe, as affected animals experience progressive neurological decline, weight loss, behavioral changes, and eventual death with no treatment options available to alleviate their suffering or halt disease progression.

Understanding scrapie and its implications is essential for all goat producers, regardless of herd size or production focus. Because there is no treatment, no vaccine, and no cure for this disease, prevention through genetic selection, rigorous biosecurity, and participation in scrapie eradication programs represents the only effective strategy for protecting herds. Early recognition of potential cases enables rapid reporting to veterinary authorities, helping to prevent spread within and between herds. Producers who educate themselves about scrapie and implement appropriate preventive measures play a crucial role in the global effort to eradicate this ancient and devastating disease from small ruminant populations.

Scrapie is caused by prions, which are abnormal, misfolded proteins that differ fundamentally from all other known infectious agents. Unlike bacteria, viruses, parasites, or fungi, prions contain no genetic material and cannot be destroyed by conventional disinfection methods, heat treatment, or antibiotics. The normal prion protein exists naturally in healthy animals and serves important cellular functions, but when it becomes misfolded into the abnormal scrapie-associated form, it triggers a chain reaction that converts normal proteins into the disease-causing configuration. This accumulation of abnormal prions in brain tissue creates characteristic sponge-like lesions that progressively destroy nervous system function and eventually result in death.

Genetic factors play a significant role in determining an individual animal's susceptibility to scrapie infection. Specific genes control the structure of the normal prion protein, and certain genetic variants make animals highly resistant to infection while others create extreme susceptibility. In sheep, the genetics of scrapie susceptibility have been extensively studied, and breeding for resistant genotypes has become a cornerstone of eradication efforts in many countries. In goats, the genetic picture is more complex and less well characterized, though research has identified some genetic variants associated with altered susceptibility. Producers can work with geneticists and veterinarians to incorporate genetic testing and selective breeding into their scrapie prevention strategies.

Transmission of scrapie occurs primarily through environmental contamination and direct contact with infected animals or their birthing materials. The placenta and birthing fluids of infected does contain extremely high concentrations of prions, which contaminate pastures, housing areas, and equipment. These prions persist in the environment for years, remaining infectious despite exposure to weather, sunlight, and typical cleaning procedures. Newborn kids are particularly vulnerable to infection when exposed to contaminated environments or when nursing from infected mothers, as prions can be transmitted through colostrum and milk. Horizontal transmission between adult animals is also possible through close contact and shared environments.

Several risk factors increase the likelihood of scrapie introduction and spread within goat herds. Purchasing animals from unknown sources or herds without certified scrapie-free status represents the highest risk for disease introduction. Sharing breeding bucks between farms, attending shows and sales where animals from multiple sources commingle, and introducing animals without adequate quarantine all create opportunities for prion transmission. Herds with no history of genetic testing or selection for resistance may contain higher proportions of susceptible animals, amplifying the impact of any disease introduction. The extremely long incubation period, often two to five years or longer, means that infected animals may be purchased, bred, and distributed widely before clinical signs ever appear.

The pathophysiology of scrapie involves the slow but relentless accumulation of abnormal prion proteins in lymphoid tissues and the central nervous system. Following initial infection, prions replicate first in lymphoid tissues such as tonsils, lymph nodes, and spleen before eventually reaching the brain and spinal cord. This process occurs over months to years without any outward signs of disease. Once prions begin accumulating in the brain, they trigger neuronal death and the formation of microscopic vacuoles that give the brain tissue its characteristic spongy appearance. As brain damage progresses, clinical signs emerge and worsen until the animal can no longer function and dies. Understanding this slow, inexorable disease process helps explain why early detection and prevention are so critical in scrapie control programs.

Early warning signs of scrapie in goats can be extremely subtle and easily overlooked, especially given the slow progression of this disease. Initial changes may include mild alterations in behavior or temperament that owners attribute to other causes or simply individual variation. Affected goats may appear slightly more nervous, excitable, or apprehensive than normal, showing exaggerated responses to routine handling or environmental stimuli. Some animals begin losing condition despite adequate nutrition, with gradual weight loss that progresses over weeks to months. Changes in coat quality, including dullness, roughness, or patches of hair loss, may also appear early in the disease course. Because these signs are nonspecific and develop slowly, scrapie is rarely suspected until more characteristic symptoms emerge.

The hallmark symptom that gives scrapie its name is intense pruritus, or itching, that drives affected animals to scrape and rub obsessively against any available surface. Goats with scrapie may spend hours rubbing their bodies against fences, feeders, walls, and trees, often focusing on the hindquarters, flanks, and shoulders. This behavior causes characteristic wool or hair loss in affected areas, along with skin damage, abrasions, and secondary infections. The itching response can be so intense that animals interrupt feeding and other normal behaviors to engage in rubbing. A positive nibble reflex, where rubbing or scratching an affected area causes the animal to make rhythmic lip and tongue movements, is considered highly suggestive of scrapie when present in conjunction with other clinical signs.

Behavioral changes in scrapie-affected goats reflect the progressive damage occurring in the brain. Animals may become increasingly nervous, fearful, or aggressive, with dramatic changes from their baseline temperament. Affected goats often appear hyperexcitable, startling excessively at normal sounds or movements and sometimes displaying trembling or tremors. As the disease progresses, some animals develop abnormal behaviors such as star-gazing, where they stand with the head raised and extended as if looking at something overhead. Depression and dullness may alternate with periods of excitability, and affected animals typically separate themselves from the herd, spending increasing amounts of time alone. These behavioral changes can make handling dangerous for both the animal and the producer.

Physical signs of scrapie extend beyond the scratching behavior and coat changes. Progressive weight loss continues despite good appetite in many cases, resulting in an emaciated appearance with prominent bones and muscle wasting. Affected goats may show changes in posture and gait, including a high-stepping or goose-stepping walk, bunny-hopping with the hind legs, swaying of the hindquarters, and general incoordination. Head tremors, especially fine tremors of the head and neck, may be visible when the animal is at rest or become more pronounced when the animal is stressed or excited. Some animals develop head tilts, circling behavior, or blindness as specific areas of the brain become affected by prion accumulation.

Symptom progression in scrapie follows a predictable but variable timeline, with most animals showing clinical signs for weeks to months before death. Initially subtle changes in behavior and condition gradually worsen, with more obvious neurological signs developing as the disease advances. The rubbing and scratching behavior typically intensifies, causing increasingly severe hair loss and skin damage. Incoordination and ataxia progress until affected animals have difficulty walking, standing, and maintaining normal posture. Weight loss continues despite ongoing feed intake, reflecting the metabolic demands of the disease and the animal's decreasing ability to compete for resources. Terminal animals may become recumbent and unable to rise, at which point death typically follows within days.

Certain symptoms constitute emergencies requiring immediate veterinary attention and notification of animal health authorities. Any goat showing progressive neurological signs, especially in combination with weight loss and rubbing behavior, should be evaluated promptly by a veterinarian. Recumbent animals, animals showing severe incoordination or inability to walk, and animals with dramatic behavioral changes require immediate assessment. Because scrapie is a reportable disease in most jurisdictions, veterinarians are legally obligated to report suspected cases to regulatory authorities. Producers who suspect scrapie in their herds should contact their veterinarian and state or federal animal health officials immediately, as early reporting enables rapid response to prevent further spread and protects other producers in the region.

Clinical examination for suspected scrapie cases begins with a thorough history and observation of the animal in its home environment. Veterinarians will ask detailed questions about the duration and progression of symptoms, the animal's age and origin, and any known exposure to scrapie or purchases from affected flocks. Observation of the animal at rest and during movement helps identify characteristic gait abnormalities, postural changes, and behavioral signs. Physical examination includes evaluation of body condition, assessment of skin and coat for evidence of rubbing and hair loss, and neurological evaluation to characterize the type and severity of nervous system involvement. The nibble reflex test, where the examiner scratches along the back and flanks while observing for lip-smacking movements, can provide supportive evidence for scrapie when positive.

Diagnostic testing for scrapie has historically been limited by the nature of prion diseases and the location of diagnostic lesions in the brain. Definitive diagnosis in live animals became possible with the development of third eyelid lymphoid tissue biopsy and rectal mucosa biopsy techniques, which can detect prion accumulation in lymphoid tissue before clinical signs develop. These tests are highly specific but not perfectly sensitive, meaning that negative results do not completely rule out infection. Blood tests for scrapie are under development but not yet widely available for routine diagnostic use. Genetic testing to determine an animal's susceptibility status provides valuable information for breeding decisions and risk assessment but does not diagnose active infection.

Historical gold-standard diagnosis of scrapie requires examination of brain tissue, which can only be obtained after death. Necropsy and histopathological examination of the brain reveal the characteristic spongy vacuolation of neurons that confirms transmissible spongiform encephalopathy. Immunohistochemistry testing of brain tissue using antibodies specific for the abnormal prion protein provides definitive confirmation of scrapie. These post-mortem tests remain the most reliable diagnostic methods and are required for official confirmation of cases by regulatory authorities. Animals that die or are euthanized with suspected scrapie should be submitted for testing through appropriate regulatory channels to confirm or rule out the diagnosis.

Differential diagnosis for animals presenting with scrapie-like symptoms includes several other conditions that can cause similar neurological signs. Listeriosis, a bacterial infection of the brain, can cause circling, head tilts, and behavioral changes. Polioencephalomalacia, caused by thiamine deficiency, produces blindness, incoordination, and neurological dysfunction. Rabies must always be considered in animals with behavioral changes and neurological signs, though rabies typically progresses much more rapidly than scrapie. External parasites, allergic conditions, and other causes of pruritus must be differentiated from the itching associated with scrapie. Caprine arthritis encephalitis, pregnancy toxemia, and other metabolic conditions can also cause some overlapping symptoms. Thorough veterinary evaluation and appropriate diagnostic testing are essential to reach an accurate diagnosis and implement appropriate response measures.

There is no treatment for scrapie, and this reality represents one of the most challenging aspects of this disease for producers and veterinarians alike. Unlike bacterial infections that respond to antibiotics or parasitic infestations that can be eliminated with dewormers, prion diseases cannot be treated, slowed, reversed, or cured by any known medical intervention. Once an animal develops clinical signs of scrapie, the outcome is invariably fatal, typically within weeks to months of symptom onset. This absence of treatment options makes prevention, early detection, and rapid response to suspected cases the only strategies available for managing scrapie at the individual animal and herd levels.

Management decisions for animals suspected or confirmed to have scrapie focus on preventing further transmission and minimizing animal suffering. Affected animals should be immediately isolated from the rest of the herd to reduce environmental contamination and prevent direct transmission to herd mates. Euthanasia is the recommended course of action for clinically affected animals, as there is no possibility of recovery and continued survival only prolongs suffering while increasing environmental prion contamination. Euthanasia should be performed humanely by a veterinarian or trained individual, and carcass disposal must follow regulatory guidelines to prevent environmental contamination and potential spread to other animals or herds.

When scrapie is confirmed in a herd, regulatory authorities become involved in managing the response and implementing control measures. Depending on the jurisdiction and the specific circumstances, responses may range from increased surveillance and movement restrictions to complete herd depopulation. Genetic testing of remaining herd members can identify animals with resistant genotypes that may be permitted to remain under certain certification programs. Animals with susceptible genotypes or unknown genetic status may be subject to mandatory removal and testing. Producers should work closely with state and federal animal health officials to understand their options and obligations when scrapie is diagnosed in their herds.

Supportive care for scrapie-affected animals is limited and primarily focused on maintaining comfort until euthanasia is performed. Animals should be provided with easily accessible food and water, protected from environmental stresses, and housed in areas where they are unlikely to injure themselves due to incoordination. Pain management may be considered if animals appear to be in discomfort, though the neurological nature of this disease makes pain assessment difficult. Most veterinarians and animal welfare experts recommend early euthanasia rather than prolonged supportive care, as there is no benefit to extended survival and significant potential for suffering as the disease progresses.

Herd-level management following scrapie diagnosis involves extensive cleaning, disinfection, and environmental management, though complete elimination of prions from contaminated environments is extremely difficult. Prions are resistant to conventional disinfectants, heat treatment, and environmental degradation, persisting in soil and on surfaces for years. Recommendations for environmental decontamination include removal and disposal of contaminated bedding and organic material, treatment of surfaces with strong chlorine solutions or sodium hydroxide where feasible, and extended rest periods before reintroduction of susceptible animals. Complete replacement of equipment that cannot be adequately disinfected may be necessary. Pastures where affected animals gave birth should be considered contaminated for extended periods.

The decision-making process for producers facing scrapie in their herds involves weighing multiple factors including regulatory requirements, economic considerations, genetic value of animals, and long-term herd management goals. Complete herd depopulation, while devastating, may allow faster return to scrapie-free status and normal operations. Selective removal based on genetic testing preserves valuable genetics but requires ongoing surveillance and management. Participation in official scrapie certification programs provides a framework for managing the situation while working toward certified free status. Producers should consult with veterinarians, extension specialists, and regulatory officials to develop management plans that address both immediate needs and long-term goals for their operations.

Recovery from scrapie is not possible for individual animals, as this disease is invariably fatal with no exceptions documented in the scientific literature. The abnormal prion proteins that cause scrapie cannot be cleared from the body by the immune system or eliminated by any medical treatment. Once clinical signs develop, affected animals experience progressive neurological deterioration until death occurs, typically within several weeks to a few months. This absolute lack of individual animal recovery underscores the critical importance of prevention and the emotional difficulty this disease presents for producers who must accept that affected animals cannot be saved.

Post-diagnosis management for herds affected by scrapie focuses on recovering the herd's health status and returning to normal operations over time. Depending on regulatory requirements and management decisions, this process may take years and involves extensive surveillance, testing, and documentation. Producers who participate in official scrapie eradication programs work with animal health officials to meet specific requirements for testing, genetic selection, and biosecurity that allow eventual certification as scrapie-free. The timeline for regaining certified status varies by program and circumstances but typically requires several years of negative surveillance and compliance with program requirements.

Prognosis factors for herds following scrapie diagnosis depend on the extent of disease spread within the herd, the genetic composition of remaining animals, and the effectiveness of response measures implemented. Herds where cases were detected early, before extensive environmental contamination occurred, generally have better outcomes than those where disease was widespread before detection. Herds with higher proportions of genetically resistant animals can be more easily managed toward freedom from disease. Producer commitment to implementing rigorous biosecurity, participating in surveillance programs, and making difficult culling decisions significantly influences the speed and success of herd recovery.

Return to production following scrapie diagnosis requires careful planning and ongoing vigilance. Producers should work with veterinarians to develop comprehensive biosecurity protocols for preventing reintroduction of disease. Genetic testing and selective breeding to increase the proportion of resistant animals in the herd reduces future risk. Careful evaluation of any animals introduced to the herd, including genetic testing and verification of source herd status, prevents inadvertent reintroduction. Record-keeping and monitoring systems should be implemented to facilitate early detection of any future cases. While full recovery to pre-diagnosis operations is possible, it requires sustained effort, investment, and commitment to disease prevention over the long term.

No vaccine exists for scrapie, and given the unique nature of prion diseases, development of an effective vaccine presents extraordinary scientific challenges that have not yet been overcome. Unlike conventional infectious agents, prions do not trigger typical immune responses that vaccines are designed to enhance. Research into potential vaccination strategies continues, but producers cannot rely on vaccination as a prevention tool and must focus on other prevention strategies. This reality makes the other pillars of scrapie prevention—genetic selection, biosecurity, and program participation—even more critical for protecting herds from this devastating disease.

Genetic selection for scrapie resistance represents one of the most effective tools available for long-term disease prevention in goat herds. Specific genetic variants of the prion protein gene confer varying degrees of resistance to scrapie infection, and testing is available to determine individual animals' genetic status. While the genetics of scrapie resistance in goats are less well-characterized than in sheep, breeding programs that select for known resistance markers can gradually reduce herd susceptibility. Producers should work with veterinarians and geneticists to implement testing programs, identify resistant breeding animals, and develop long-term genetic improvement strategies that incorporate scrapie resistance alongside other important production traits.

Biosecurity measures to prevent scrapie introduction form the foundation of herd protection strategies. The highest-risk activity for scrapie introduction is purchasing or acquiring animals from unknown sources or herds without certified scrapie-free status. Producers should only purchase animals from herds participating in official scrapie certification programs, with documented testing and surveillance history. Any new animals should be quarantined and tested before introduction to the main herd. Avoiding shared breeding bucks, shared transportation equipment, and commingling at shows or sales without proper precautions reduces exposure risks. Fencing to prevent contact with neighboring flocks and controlling visitor access to animal areas further reduces transmission opportunities.

Management practices that support scrapie prevention include rigorous attention to kidding area hygiene and placenta disposal. Because birthing materials contain the highest concentration of prions in infected animals, kidding areas represent major sources of environmental contamination. Placentas and afterbirth materials should be promptly collected and disposed of properly, not left in pastures where they contaminate the environment and may be consumed by other animals. Kidding areas should be cleaned between uses, and kids should be born in areas that can be managed separately from the main herd. These practices not only help prevent scrapie transmission but also support general kid health and reduce exposure to other infectious agents.

Participation in official scrapie certification and eradication programs provides structure, support, and recognition for producers committed to maintaining scrapie-free herds. Programs such as the USDA Scrapie Flock Certification Program in the United States establish specific requirements for identification, record-keeping, surveillance, and biosecurity that, when followed, lead to certified free status. Certified herds gain marketing advantages, as buyers increasingly recognize the value of purchasing from scrapie-free sources. Program participation also provides access to technical support, testing resources, and guidance for implementing effective prevention measures. Producers should contact their state veterinarian or extension service to learn about available programs and requirements for participation in their area.

Daily management and monitoring for scrapie prevention requires ongoing vigilance and attention to herd health even in the absence of known disease. Producers should observe their animals regularly for any changes in behavior, condition, or coat quality that might suggest early neurological problems. Establishing baseline knowledge of each animal's normal behavior and temperament makes it easier to recognize subtle changes that might indicate developing problems. Record-keeping systems that track individual animal observations, weights, and health events provide documentation for identifying trends and investigating concerns. Making observation and assessment a routine part of daily animal care increases the likelihood of early detection if disease ever occurs.

Housing and environmental management considerations for scrapie prevention focus on minimizing opportunities for disease transmission and facilitating cleanup if contamination occurs. Kidding areas should be designed for easy cleaning and should be separate from areas used for general herd housing. Surfaces that can be cleaned and disinfected are preferable to porous materials that harbor contamination. Adequate space and proper ventilation reduce stress and support overall herd health, which while not directly preventing scrapie, supports the immune function and well-being of the animals. Pasture management should include attention to fence lines to prevent contact with neighboring flocks and consideration of grazing rotation to minimize environmental pathogen buildup.

Herd health programs for goat operations should incorporate scrapie awareness and prevention as core components. Working with a veterinarian to develop a comprehensive herd health plan ensures that scrapie is considered alongside other important diseases affecting goats. Regular veterinary visits for routine health monitoring provide opportunities for professional observation and early problem detection. Incorporating genetic testing for scrapie susceptibility into breeding decisions systematically improves herd resistance over time. Establishing relationships with official animal health programs and staying current on scrapie status and requirements in the region supports producer preparedness and compliance with regulations.

Record-keeping and monitoring systems support scrapie prevention and provide essential documentation if disease ever occurs. Individual animal identification, whether through official scrapie program tags, microchips, or farm-specific systems, enables tracking of animals throughout their lives. Recording purchase sources, breeding records, and movement history for all animals creates documentation that can prove invaluable for tracing exposure if scrapie is diagnosed in source herds. Kidding records that document which does gave birth where and when facilitate investigation of potential exposure points. Mortality records and documentation of animals that leave the herd, whether through sale, slaughter, or death, complete the documentation needed for program compliance and disease investigation.

Economic considerations for scrapie management include both the costs of prevention and the potential devastating costs of disease introduction. Investing in genetic testing, purchasing certified animals, and implementing enhanced biosecurity involves ongoing expenses that must be weighed against production economics. However, the costs of scrapie introduction—including animal losses, movement restrictions, potential herd depopulation, market access limitations, and regulatory compliance requirements—can devastate operations financially and emotionally. Many producers find that the investment in prevention, while significant, is far less than the potential cost of disease. Additionally, market premiums for animals from certified scrapie-free herds can offset some prevention costs while supporting the overall goal of disease eradication.

All breeds of goats are susceptible to scrapie, and no breed has been identified as naturally resistant to this disease. The prion protein gene exists in all goats, and while specific genetic variants affect susceptibility, these variants occur across breeds rather than being breed-specific. Major dairy breeds including Saanen, Alpine, LaMancha, Nubian, Oberhasli, and Toggenburg all have documented cases of scrapie. Meat goat breeds including Boer, Kiko, and Spanish goats are equally susceptible. Fiber goats such as Angora and Cashmere breeds, miniature breeds including Nigerian Dwarf and Pygmy goats, and crosses of all types can develop scrapie when exposed to the disease agent.

Production type influences scrapie risk primarily through management and exposure factors rather than inherent breed susceptibility. Herds with frequent animal purchases, such as operations that regularly buy breeding stock or replacement animals, face higher introduction risk than closed herds that raise their own replacements. Show herds that travel to exhibitions and expose animals to animals from other sources have increased risk compared to herds that remain isolated. Commercial operations that sell breeding stock widely may inadvertently distribute infected animals if disease is present but undetected. Small hobby herds are not protected by their size if they acquire infected animals or have contact with infected premises.

Genetic testing and selection programs offer the most effective breed-level strategy for reducing scrapie susceptibility over time. Research has identified specific variants of the prion protein gene that confer increased resistance to scrapie in goats, though the genetics are not as well-defined as in sheep where extensive resistance breeding programs have been implemented. Producers interested in genetic selection for scrapie resistance should work with their veterinarians and breed associations to identify testing resources and incorporate resistance into their breeding goals. As more goat producers implement genetic testing and selection, the overall susceptibility of the population can be reduced, contributing to broader eradication efforts while protecting individual herds from disease.

Several conditions can occur in conjunction with scrapie or complicate its diagnosis, though scrapie's unique nature as a prion disease means it does not have true co-occurring conditions in the typical sense. Animals affected by scrapie may develop secondary problems related to their neurological impairment, including injuries from incoordination, skin infections from excessive rubbing, and weight loss from inability to compete for feed. Pregnant does with scrapie may experience reproductive complications, and the stress of the disease can trigger other latent health problems. However, these secondary issues result from scrapie rather than occurring as independent co-infections.

Several conditions can present with clinical signs similar to scrapie and must be differentiated during diagnostic workup. Caprine arthritis encephalitis virus can cause neurological signs in goats, including incoordination and behavioral changes, though it typically also affects joints and udder. Listeriosis causes circling, head tilt, and facial paralysis that may superficially resemble scrapie. Polioencephalomalacia produces blindness, head pressing, and neurological dysfunction. Rabies must always be considered in animals with behavioral changes and neurological signs. External parasites including lice and mites cause intense itching that might be confused with scrapie-related pruritus. Careful veterinary examination and appropriate diagnostic testing are essential to distinguish these conditions from scrapie.

Complications and long-term consequences of scrapie extend beyond the individual animal to affect entire herds and farming operations. Herds diagnosed with scrapie face regulatory consequences including quarantine, movement restrictions, and potential depopulation orders. Premises where scrapie-positive animals have given birth are considered contaminated, with implications for future animal housing and management. Producers may face psychological consequences including grief over animal losses, stress from regulatory requirements, and concern about their reputations and livelihoods. The broader community of producers may experience increased surveillance, testing requirements, and market disruptions when scrapie is diagnosed in a region. Understanding these far-reaching implications reinforces the importance of prevention and rapid response when scrapie is suspected.