Campylobacter Infection in Lemurs: Causes of Diarrhea and Gut Disease

Campylobacter infection, also called campylobacteriosis, is a bacterial disease of the intestinal tract. In animals, Campylobacter jejuni is the best-known species, although other Campylobacter species can also be involved. These spiral-shaped bacteria can live in the gut of many animals, and some infected animals show diarrhea while others carry and shed the organism without obvious illness.

In nonhuman primates, Campylobacter is recognized as one of the bacterial causes of gastrointestinal disease. That matters for lemurs because diarrhea in this species can become serious quickly, especially if appetite drops or dehydration develops. Clinical signs can overlap with other causes of enteritis, including parasites, diet change, stress, Salmonella, Shigella, or other bacterial overgrowth, so testing is important.

Campylobacter also has zoonotic potential, meaning it can sometimes spread from animals to people through fecal contamination. For pet parents and animal caretakers, that makes sanitation, handwashing, and safe handling of stool and enclosure surfaces an important part of care.

Campylobacter infection usually starts when a lemur ingests bacteria from contaminated feces, food, water, surfaces, or enclosure items. Fecal-oral spread is the main route. In captive nonhuman primates, transmission is more likely when animals are housed in groups, when sanitation slips, or when a new animal introduces infection into the environment.

Stress can also play a role. Transport, social disruption, crowding, concurrent illness, and sudden husbandry changes may make intestinal disease more likely or increase bacterial shedding. Young animals are often more vulnerable to enteric infections, and some animals can carry Campylobacter without looking sick, which makes outbreaks harder to spot early.

Raw or contaminated food items, unclean water sources, and contact with infected animals or their stool can all contribute. Because diarrhea in lemurs has many possible causes, Campylobacter is usually considered one item on a broader list that includes intestinal parasites, other bacterial infections, viral disease, inflammatory bowel problems, and diet-related upset.

Your vet will usually start with a full history and physical exam, including questions about stool quality, appetite, recent stress, enclosure changes, new animal introductions, and possible exposure to contaminated food or water. Since diarrhea in lemurs can have several causes, diagnosis should not rely on symptoms alone.

Testing often includes a fecal PCR panel, fecal culture, or both. Merck notes that Campylobacter diagnosis in animals is commonly made by culture, which can be challenging, or by PCR interpreted alongside clinical signs. Your vet may also recommend fecal parasite testing, bloodwork to check hydration and organ function, and sometimes imaging if there is concern for obstruction, severe inflammation, or another disease process.

A positive test does not always mean Campylobacter is the only cause of illness, because some animals can carry the bacteria without active disease. That is why your vet will interpret results in context, looking at the severity of diarrhea, exam findings, and whether other pathogens or husbandry factors may also be involved.

Prevention starts with good hygiene. Remove feces promptly, disinfect food and water dishes regularly, and keep enclosure surfaces clean and dry. Wash hands well after handling your lemur, stool, bedding, dishes, or anything contaminated with feces. If gloves are used during cleanup, they should still be followed by handwashing.

Food and water safety matter too. Offer clean water, store produce properly, and avoid feeding spoiled or contaminated items. If your vet has concerns about raw feeding or other high-risk food practices, ask for a safer nutrition plan. New animals should be quarantined and monitored before being introduced to established animals, especially in multi-animal settings.

Because some infected animals may shed bacteria without obvious illness, prevention also depends on early response to diarrhea. Isolate affected animals when possible, clean high-touch surfaces more often, and contact your vet promptly for testing guidance. This is especially important if there are children, older adults, pregnant people, or immunocompromised people in the home, since Campylobacter can infect humans.