Salmonellosis

Salmonellosis is a serious bacterial infection caused by various species of Salmonella bacteria, most commonly Salmonella enterica and Salmonella typhimurium, that affects guinea pigs and poses significant health risks to both the animals and their human caregivers. This gram-negative bacterial infection primarily targets the gastrointestinal system but can rapidly become systemic, spreading throughout the body and affecting multiple organ systems including the liver, spleen, and lymph nodes. Guinea pigs are particularly susceptible to salmonellosis due to their sensitive digestive systems and their nature as hindgut fermenters, which means any disruption to their gut flora can have devastating consequences.

Salmonellosis occurs sporadically in pet guinea pig populations but can cause devastating outbreaks in breeding facilities, pet stores, and rescue organizations where animals are housed in close proximity. The bacteria are shed in the feces of infected animals, contaminating the environment, food, and water sources. Transmission occurs through the fecal-oral route, meaning guinea pigs become infected by ingesting contaminated materials. Stress, overcrowding, poor sanitation, and nutritional deficiencies, particularly vitamin C deficiency, significantly increase susceptibility to infection and disease severity.

The impact of salmonellosis on guinea pig health can range from subclinical carrier states, where the animal shows no symptoms but actively sheds bacteria, to acute fatal septicemia that can kill an animal within 24 to 48 hours. Chronic carriers pose a particular challenge as they can continuously spread the infection to cage mates and other animals in the household while appearing perfectly healthy. The disease also causes significant welfare concerns due to the severe gastrointestinal symptoms, dehydration, and systemic illness that affected guinea pigs experience.

Early detection and aggressive treatment are absolutely critical for survival, though the prognosis for clinical salmonellosis in guinea pigs remains guarded even with appropriate veterinary intervention. The zoonotic nature of this disease, meaning it can spread from guinea pigs to humans, adds another layer of concern and necessitates strict hygiene protocols when caring for infected or potentially infected animals. Immunocompromised individuals, young children, elderly persons, and pregnant women are at highest risk for contracting salmonellosis from infected pets and should exercise extreme caution or avoid contact entirely.

The primary cause of salmonellosis in guinea pigs is infection with Salmonella bacteria, most commonly Salmonella enterica subspecies enterica, including serovars typhimurium and enteritidis. These gram-negative, facultatively anaerobic bacteria are highly resilient in the environment and can survive for extended periods in bedding, food, water, and fecal material. Guinea pigs become infected primarily through the fecal-oral route by ingesting contaminated food, water, or bedding materials. The bacteria can also be introduced through contaminated fresh vegetables, particularly leafy greens that have been exposed to animal waste or contaminated irrigation water during growing and harvesting.

While salmonellosis is not considered a hereditary condition, certain genetic factors may influence individual susceptibility to infection and disease severity. Guinea pigs with compromised immune systems, whether due to genetic factors, concurrent illness, or chronic stress, are significantly more likely to develop clinical disease when exposed to Salmonella bacteria. Young guinea pigs with immature immune systems and elderly animals with declining immune function are at particularly high risk for severe disease outcomes.

Environmental factors play a crucial role in the transmission and severity of salmonellosis outbreaks. Overcrowded housing conditions, inadequate ventilation, poor sanitation practices, and infrequent bedding changes create ideal conditions for bacterial proliferation and transmission. Contaminated food sources, including improperly stored hay, pellets exposed to rodent droppings, and unwashed vegetables, serve as common vectors for introducing Salmonella into guinea pig colonies. Shared food bowls and water bottles in group housing situations facilitate rapid spread among cage mates.

Several risk factors significantly increase the likelihood of guinea pigs developing clinical salmonellosis. Vitamin C deficiency, which is extremely common in guinea pigs due to their inability to synthesize this essential nutrient, severely compromises immune function and increases susceptibility to bacterial infections. Chronic stress from improper handling, social isolation, environmental changes, or concurrent illness suppresses immune responses and allows opportunistic infections to take hold. Recent antibiotic treatment can disrupt the normal protective gut flora, creating an environment where pathogenic bacteria like Salmonella can proliferate unchecked.

Once ingested, Salmonella bacteria colonize the intestinal tract, where they invade the epithelial cells lining the gut and trigger an intense inflammatory response. The bacteria produce endotoxins that damage intestinal tissue and can enter the bloodstream, leading to septicemia and disseminated infection throughout the body. In guinea pigs, the bacteria frequently target the liver, spleen, and mesenteric lymph nodes, causing abscess formation and organ dysfunction. The combination of intestinal damage, toxin production, and systemic infection explains the rapid deterioration and high mortality rate observed in clinical cases of guinea pig salmonellosis.

Early warning signs of salmonellosis in guinea pigs can be extremely subtle and easily overlooked, which is particularly dangerous given how rapidly this disease can progress to life-threatening septicemia. As prey animals, guinea pigs instinctively hide signs of illness to avoid appearing vulnerable to predators, meaning by the time symptoms become obvious, the infection may already be advanced. Initial signs may include slight decreases in appetite, reduced activity levels, and subtle changes in fecal consistency that caregivers might dismiss as minor digestive upset. Some guinea pigs may show mild conjunctivitis, characterized by slightly watery or reddened eyes, which can precede more severe systemic symptoms.

As the infection progresses, more obvious clinical symptoms develop that should prompt immediate veterinary attention. Diarrhea is one of the hallmark symptoms of salmonellosis, ranging from soft, poorly formed stools to severe watery or bloody diarrhea that rapidly leads to dehydration. Affected guinea pigs often display significant weight loss due to both decreased food intake and malabsorption caused by intestinal damage. Fever may be present, though it can be difficult for owners to detect without proper equipment, and some animals may actually become hypothermic as the disease advances and their body's ability to regulate temperature fails.

Behavioral changes in guinea pigs with salmonellosis are often dramatic and serve as important indicators of serious illness. Infected animals typically become lethargic and withdrawn, spending increased time hiding in shelters or corners rather than engaging in normal activities. They may stop vocalizing, including the characteristic wheeking sounds guinea pigs make when excited about food, and show little interest in interaction with cage mates or human caregivers. Affected guinea pigs often adopt a hunched posture with a rough, unkempt coat due to decreased grooming behavior and general malaise.

Physical examination findings in guinea pigs with salmonellosis reveal multiple concerning abnormalities. The abdomen may be distended and painful on palpation due to intestinal gas accumulation and inflammation. Enlarged lymph nodes, particularly the mesenteric lymph nodes in the abdominal cavity, may be detectable by an experienced veterinarian. The fur often appears dull and may be soiled around the hindquarters due to diarrhea. Mucous membranes may appear pale due to dehydration or take on a bluish tinge in cases of severe septicemia with compromised circulation.

Symptom progression in salmonellosis can be alarmingly rapid, with guinea pigs deteriorating from apparently healthy to critically ill within 24 to 48 hours. Acute cases may present with sudden onset of severe depression, complete anorexia, profuse diarrhea, and rapid dehydration. Pregnant sows infected with Salmonella frequently abort their pregnancies, and this may be the first sign of infection in breeding colonies. Some guinea pigs develop neurological symptoms including head tilt, circling, or seizures if the bacteria spread to the central nervous system.

Emergency symptoms requiring immediate veterinary care include severe watery or bloody diarrhea, complete refusal to eat or drink, extreme lethargy or unresponsiveness, labored breathing, abdominal distension with obvious pain, and collapse. Guinea pigs showing these signs are in critical condition and require aggressive emergency treatment to have any chance of survival. Any guinea pig with diarrhea lasting more than 12 to 24 hours should be considered a medical emergency, as dehydration and electrolyte imbalances can quickly become fatal in these small animals. Temperature extremes, either fever or hypothermia, combined with other symptoms indicate systemic involvement and a poor prognosis without immediate intervention.

Diagnosis of salmonellosis in guinea pigs begins with a thorough initial examination by a veterinarian experienced with exotic species and cavy medicine specifically. The veterinarian will obtain a detailed history including recent diet changes, new animal introductions, potential exposure to wild rodents or contaminated food sources, and the timeline of symptom development. Physical examination typically reveals dehydration evidenced by skin tenting and tacky mucous membranes, abdominal discomfort on palpation, and often palpably enlarged mesenteric lymph nodes or hepatomegaly. The presence of diarrhea, particularly if bloody or containing mucus, combined with systemic signs of illness strongly suggests bacterial enteritis requiring further diagnostic workup.

Diagnostic testing for salmonellosis involves multiple laboratory evaluations to confirm the presence of Salmonella bacteria and assess the extent of systemic involvement. Fecal culture remains the gold standard for diagnosis, with samples submitted for aerobic bacterial culture and sensitivity testing. However, it is important to note that Salmonella may be shed intermittently, meaning negative cultures do not definitively rule out infection, and multiple samples may be needed. Blood work including a complete blood count often reveals elevated white blood cell counts with a left shift indicating active bacterial infection, while biochemistry panels may show elevated liver enzymes and markers of dehydration. In deceased animals or severe cases, tissue cultures from the liver, spleen, and lymph nodes provide definitive diagnosis.

Differential diagnosis for guinea pigs presenting with diarrhea and systemic illness includes several other conditions that must be ruled out. Other bacterial infections including Clostridium difficile, Escherichia coli, and Yersinia enterocolitica can cause similar clinical presentations. Parasitic infections such as coccidiosis, Cryptosporidium, and intestinal flagellates should be investigated through fecal examination and flotation testing. Antibiotic-associated dysbiosis in guinea pigs previously treated with inappropriate antibiotics can mimic salmonellosis symptoms. Viral infections, while less common in guinea pigs, may also be considered in the differential list depending on clinical presentation and history.

Once Salmonella infection is confirmed through culture, additional testing helps assess disease severity and guide treatment decisions. Antibiotic sensitivity testing is absolutely essential because Salmonella species frequently demonstrate antibiotic resistance, and using an ineffective antibiotic wastes precious time while the infection progresses. Radiographic imaging may reveal hepatomegaly, splenomegaly, or intestinal changes consistent with severe enteritis. Ultrasound examination can better characterize abdominal organ involvement and identify abscess formation. The combination of culture confirmation, sensitivity results, and assessment of systemic involvement allows the veterinarian to develop an appropriate treatment plan and provide a realistic prognosis to the owner, which unfortunately remains guarded to poor in most clinical cases of guinea pig salmonellosis.

Emergency treatment for guinea pigs with suspected or confirmed salmonellosis focuses on aggressive supportive care to address the immediate life-threatening complications of dehydration, septicemia, and gastrointestinal dysfunction. Fluid therapy is the cornerstone of initial treatment, with subcutaneous or intravenous fluids administered to correct dehydration and maintain hydration status throughout treatment. Warming support is often necessary as many critically ill guinea pigs become hypothermic and cannot regulate their body temperature effectively. Nutritional support through assisted syringe feeding with critical care formulas is essential, as maintaining gut motility and providing calories are crucial for survival. Pain management with guinea pig-safe analgesics helps improve comfort and encourages eating.

Medical management with appropriate antibiotics forms the core of salmonellosis treatment, but antibiotic selection in guinea pigs requires extreme caution due to their unique physiology. Guinea pigs are obligate hindgut fermenters with a delicate intestinal microbiome, and many antibiotics commonly used in other species are absolutely contraindicated and potentially fatal. Penicillins, ampicillin, amoxicillin, cephalosporins, clindamycin, and lincomycin must never be given to guinea pigs as they cause fatal dysbiosis and pseudomembranous enterocolitis. Safe antibiotic options for guinea pigs include enrofloxacin, trimethoprim-sulfa combinations, chloramphenicol, and certain aminoglycosides, with the specific choice guided by culture and sensitivity results.

Surgical intervention is rarely indicated in salmonellosis cases but may be considered in specific circumstances. If imaging reveals distinct abscess formation in the liver, spleen, or lymph nodes, surgical drainage or excision may be attempted in stable patients, though the prognosis for such advanced disease remains extremely poor. In most cases, the disseminated nature of Salmonella infection in guinea pigs makes surgical cure impossible, and treatment focuses on medical management and supportive care rather than surgical solutions.

Supportive care measures are absolutely critical for survival and require intensive nursing care often lasting several weeks. Assisted feeding with specialized herbivore critical care formula must be performed every two to four hours for guinea pigs not eating on their own, as gastrointestinal stasis is an emergency in these animals. Vitamin C supplementation at elevated doses supports immune function and tissue healing during infection. Probiotic supplementation with guinea pig-appropriate products helps restore beneficial gut bacteria depleted by both the infection and antibiotic treatment. Environmental support including warm, clean, quiet housing reduces stress and supports recovery.

Alternative and complementary treatments can support conventional therapy but should never replace appropriate veterinary care and antibiotic treatment. Fluid supplementation with electrolyte solutions between veterinary fluid administrations helps maintain hydration. Gentle abdominal massage may help stimulate gut motility in recovering animals. Maintaining the guinea pig with a bonded companion, if the companion is also being treated or monitored, can reduce stress and encourage eating. Herbal appetite stimulants approved by the veterinarian may encourage voluntary food intake during recovery.

Treatment decisions must account for several important factors including the zoonotic nature of salmonellosis and public health considerations. The carrier state that can persist after clinical recovery means treated guinea pigs may continue shedding Salmonella bacteria for extended periods, posing ongoing infection risks to other animals and humans. In households with immunocompromised individuals, young children, elderly persons, or pregnant women, the decision to treat versus humanely euthanize an infected guinea pig requires serious discussion about ongoing transmission risks. The cost of treatment, which can be substantial given the intensive care required, and the guarded prognosis even with aggressive treatment are additional factors owners must consider when making treatment decisions.

Recovery from salmonellosis in guinea pigs is a prolonged process that typically spans several weeks to months, assuming the animal survives the initial acute phase of illness. The critical period during the first 72 to 96 hours following diagnosis determines whether recovery is possible, with guinea pigs that stabilize during this window having improved chances of survival. Clinical improvement including return of appetite, resolution of diarrhea, improved energy levels, and weight stabilization generally occurs over one to three weeks with appropriate treatment. However, complete recovery with clearance of the bacterial infection may take considerably longer, and some guinea pigs never fully eliminate the organism, becoming chronic carriers.

Post-treatment care for recovering guinea pigs requires continued intensive attention and monitoring even after clinical symptoms resolve. Assisted feeding may need to continue for days to weeks until the guinea pig consistently eats sufficient quantities independently to maintain body weight. Antibiotic therapy typically continues for a minimum of two to four weeks, with the exact duration determined by culture results and clinical response. Follow-up fecal cultures are essential to document bacterial clearance, with most veterinarians recommending at least three negative cultures taken at weekly intervals before considering a guinea pig clear of infection. Vitamin C supplementation should continue at elevated levels throughout recovery and long-term to support immune function.

Prognosis for guinea pigs with salmonellosis depends on multiple factors including the speed of diagnosis and treatment initiation, severity of disease at presentation, overall health status prior to infection, and response to initial therapy. Guinea pigs diagnosed and treated early in the disease course before systemic involvement have the best chances of survival, potentially exceeding 50 percent with aggressive treatment. Animals presenting with septicemia, severe dehydration, or multi-organ involvement face mortality rates exceeding 70 to 90 percent despite treatment. The strain of Salmonella involved and its antibiotic sensitivity profile also significantly impact prognosis.

Long-term outlook for surviving guinea pigs varies considerably and involves important ongoing management considerations. Some guinea pigs make complete recoveries and go on to live normal, healthy lives with appropriate continued care and monitoring. However, a significant percentage of survivors become chronic carriers who appear clinically healthy but intermittently shed Salmonella bacteria, posing ongoing infection risks. Chronic carriers may experience recurrent episodes of clinical disease during periods of stress or concurrent illness. Surviving guinea pigs may also have residual organ damage, particularly to the liver, spleen, or intestinal tract, that can impact long-term health and longevity. Owners must understand and accept these long-term implications when committing to treatment of salmonellosis in their guinea pigs.

Primary prevention of salmonellosis in guinea pigs centers on maintaining excellent hygiene practices, providing optimal nutrition, and minimizing stress factors that compromise immune function. All incoming guinea pigs should be quarantined for a minimum of two to four weeks before introduction to established animals, with careful observation for any signs of illness during this period. Proper nutrition including unlimited timothy hay, appropriate pellets, and fresh vegetables provides the foundation for a healthy immune system capable of resisting infection. Most critically, adequate vitamin C supplementation through diet or supplements is essential, as vitamin C deficiency severely compromises guinea pig immunity and increases susceptibility to all infectious diseases including salmonellosis.

Environmental prevention strategies focus on maintaining clean, sanitary housing conditions that minimize bacterial contamination and transmission. Cages should be cleaned thoroughly at least once weekly with complete bedding replacement, and spot-cleaned daily to remove soiled areas. Food bowls and water bottles must be cleaned and sanitized regularly, with water changed daily to prevent bacterial growth. Bedding materials should be stored properly to prevent contamination by rodents or other animals, and any bedding showing signs of moisture, mold, or pest contamination must be discarded. Housing should provide adequate space and ventilation to reduce stress and prevent overcrowding-related disease transmission.

Dietary prevention measures are particularly important given the common routes of Salmonella transmission through contaminated food sources. All fresh vegetables should be washed thoroughly before feeding, with organic produce preferred when available due to lower pesticide residues and potentially reduced contamination risks. Hay should be sourced from reputable suppliers and stored in clean, dry, pest-proof containers. Pellets should be fresh, properly stored, and free from any signs of moisture damage or contamination. Treats and supplements should come from trusted sources, and any food showing signs of spoilage must be immediately discarded.

Health maintenance through regular veterinary care and ongoing monitoring supports early disease detection and prevention. Guinea pigs should receive wellness examinations by an exotic-experienced veterinarian at least annually, with senior animals and those with health conditions examined more frequently. Regular weight monitoring at home helps detect early illness, as weight loss is often one of the first indicators of health problems in guinea pigs. Dental examinations should be included in routine care since dental disease causes pain, reduced eating, and immune compromise that increases infection susceptibility. Maintaining detailed health records helps identify patterns and catch problems early.

Early intervention strategies can prevent individual cases from becoming colony-wide outbreaks. Any guinea pig showing signs of illness, particularly diarrhea, should be immediately isolated from healthy animals and veterinary care sought promptly. New animals showing any signs of illness during quarantine should not be introduced to the established group until fully cleared by a veterinarian. If salmonellosis is diagnosed in a multi-guinea pig household, all animals should be tested and the environment thoroughly disinfected. Education of family members about proper hygiene, including handwashing before and after handling guinea pigs and their supplies, protects both human and animal health.

Daily management of guinea pigs diagnosed with or recovering from salmonellosis requires significant adjustments to routine care practices to support healing and prevent transmission. Infected guinea pigs should be housed separately from healthy animals in an isolation area, ideally in a different room to prevent aerosol and fomite transmission. All care for infected animals should be performed after caring for healthy guinea pigs, never before, with thorough handwashing and potentially clothing changes between groups. Feeding schedules may need modification to accommodate assisted feeding sessions, medication administration, and more frequent monitoring of food and water intake. Detailed daily records of appetite, fecal output, weight, and behavior help track recovery progress and identify any setbacks early.

Home environment modifications for guinea pigs with salmonellosis prioritize hygiene, comfort, and stress reduction. Housing should be simple and easy to clean, potentially using fleece liners that can be changed and washed daily rather than loose bedding that is harder to completely sanitize. The cage should be placed in a quiet, temperature-controlled area away from drafts, direct sunlight, and household stress such as other pets or loud noises. Multiple water sources ensure adequate hydration is available, and food should be offered in clean dishes that are sanitized daily. After recovery, the original cage and accessories should be thoroughly disinfected with appropriate veterinary-grade disinfectants effective against Salmonella before reuse.

Quality of life maintenance remains important even during illness and recovery to prevent depression and secondary complications. Gentle, low-stress interaction with the guinea pig should continue if the animal tolerates handling, as social contact is important for guinea pig wellbeing. Floor time outside the cage should be suspended during active infection to prevent environmental contamination but can gradually resume during recovery in easily cleaned areas. If the infected guinea pig was housed with companions, consideration must be given to whether companions can be housed nearby for visual and auditory contact without direct exposure, balancing infection control with the social needs of these highly social animals.

Ongoing monitoring requirements for guinea pigs with salmonellosis extend well beyond the resolution of clinical symptoms. Daily weight monitoring provides the most objective measure of overall health status and should continue long-term. Fecal consistency should be observed with each cage cleaning, noting any changes from normal. Behavior, appetite, and activity levels should be assessed daily and compared to the individual guinea pig's normal baseline. Follow-up veterinary appointments are essential for tracking recovery, obtaining surveillance cultures, and adjusting treatment plans as needed.

Caregiver support and education are essential components of managing salmonellosis in guinea pigs given the intensive care requirements and zoonotic risks. Family members should understand the importance of strict hygiene protocols including handwashing, avoiding face-to-nose contact with infected animals, and keeping guinea pigs away from food preparation areas. Immunocompromised individuals, young children, elderly persons, and pregnant women should not participate in caring for infected guinea pigs and should minimize contact. Caregivers should be educated about human salmonellosis symptoms and instructed to seek medical attention if any family members develop fever, diarrhea, or abdominal cramping. Support from exotic pet communities, both online and local, can provide emotional support and practical tips for managing the demanding care requirements of treating this serious disease.

Salmonellosis does not demonstrate significant breed predisposition in guinea pigs, as susceptibility is primarily determined by environmental factors, immune status, and exposure rather than genetic background. All guinea pig breeds including American, Abyssinian, Peruvian, Silkie, Teddy, Texel, and others are equally susceptible to Salmonella infection when exposed to the bacteria under appropriate conditions. However, certain breed-related management factors may indirectly influence infection risk. Long-haired breeds such as Peruvians, Silkies, and Texels may be at slightly increased risk during outbreaks simply because their long coats can become soiled with fecal material, increasing fecal-oral transmission opportunities and making thorough cleaning more challenging.

Some guinea pig populations face elevated salmonellosis risk due to management and housing conditions rather than breed genetics. Guinea pigs in breeding facilities, pet stores, and rescue organizations experience higher infection rates due to increased animal density, stress from frequent handling and environmental changes, and greater opportunities for pathogen introduction and transmission. Satin guinea pigs, while not more susceptible to salmonellosis specifically, often have compromised overall health due to osteodystrophy associated with the satin gene, potentially reducing their ability to fight any infection effectively. Young guinea pigs under six months and senior animals over five years demonstrate increased susceptibility due to immature or declining immune function respectively.

Screening recommendations for breeders focus on preventing introduction and spread of Salmonella within breeding colonies rather than breed-specific genetic testing. All new breeding stock should undergo quarantine with fecal cultures before joining established colonies. Breeders experiencing unexplained deaths, diarrhea outbreaks, or reproductive losses should submit samples for Salmonella testing. Regular environmental monitoring through periodic culture of high-risk areas such as food storage and preparation surfaces can identify contamination before clinical disease occurs. Responsible breeders maintain closed colonies when possible, source new animals only from reputable tested sources, and implement strict biosecurity protocols to protect their animals and customers from this serious zoonotic disease.

Several conditions commonly co-occur with or develop secondary to salmonellosis in guinea pigs. Hepatic lipidosis, or fatty liver disease, frequently develops in guinea pigs with prolonged anorexia from salmonellosis, creating a dangerous secondary condition that can be fatal even after the primary infection resolves. Dehydration and electrolyte imbalances are virtually universal in clinical salmonellosis and require aggressive correction to prevent cardiac arrhythmias and organ failure. Secondary bacterial infections may develop as the immune system is overwhelmed fighting Salmonella, potentially involving opportunistic pathogens affecting the respiratory tract, urinary system, or skin. Antibiotic-associated dysbiosis can occur during treatment, paradoxically worsening gastrointestinal symptoms even while treating the primary infection.

Several conditions present with symptoms similar to salmonellosis and must be differentiated through appropriate diagnostic testing. Other bacterial enteritides caused by Clostridium, Escherichia coli, Yersinia, or Campylobacter species can cause nearly identical clinical presentations with diarrhea, weight loss, and systemic illness. Intestinal parasitism including coccidiosis, Cryptosporidium infection, and flagellate overgrowth causes diarrhea and wasting that may mimic bacterial infection. Antibiotic-associated enterotoxemia from inappropriate antibiotic administration produces severe, often fatal diarrhea that can resemble infectious causes. Dietary indiscretion or sudden diet changes causing gastrointestinal upset may initially present similarly but typically resolve quickly without systemic involvement.

Potential complications of salmonellosis extend beyond the immediate infection and can affect long-term health outcomes. Chronic carrier status represents the most significant long-term complication, with recovered guinea pigs potentially shedding bacteria intermittently for months to years. Intestinal scarring and malabsorption from severe mucosal damage can cause chronic digestive issues and nutritional deficiencies. Hepatic or splenic abscesses may persist despite apparent clinical recovery and can reactivate during periods of stress. Reproductive consequences include abortion, stillbirth, and infertility in breeding animals. The systemic inflammatory response during severe infection may cause permanent organ damage affecting the heart, kidneys, or other vital organs, potentially shortening the guinea pig's overall lifespan even after successful treatment of the acute infection.