Lamanema chavezi in Llamas: Camelid-Specific Intestinal Parasite

Lamanema chavezi is a camelid-specific parasitic roundworm found in South American camelids such as llamas and alpacas. Unlike many intestinal worms that stay in the gut, this parasite has an entero-hepatic life cycle. After infection, immature stages migrate through the liver before the parasite completes development in the small intestine. That liver migration is what makes this parasite more concerning than a routine mild worm burden.

Because the liver is involved, affected llamas may show more than digestive upset. Some develop lethargy, appetite changes, weight loss, or poor thrift, while others may have subtle signs until liver damage becomes more advanced. Published case reports describe granulomatous and fibrotic hepatitis, and severe cases can be life-threatening.

This parasite is considered uncommon in many parts of the United States, but it has been documented in a llama born and raised in Oregon, which means local transmission can occur. For pet parents, that means a llama with vague weight loss or poor condition should not be assumed to have a routine parasite problem without proper testing through your vet.

Llamas become infected by swallowing infective parasite eggs or larvae from contaminated pasture, feed, water, or manure-contaminated environments. Once inside the body, the parasite does not stay only in the intestine. Immature stages migrate through the liver, where they can trigger inflammation and tissue damage, then return to the intestinal tract to mature.

This condition is more likely to show up when parasite control relies only on repeated deworming instead of a broader herd plan. In camelids, parasite management works best when medication decisions are paired with fecal monitoring, accurate weight-based dosing, manure removal, and pasture management. Merck notes that camelid parasite control should not rely on anthelmintics alone because resistance is a growing problem.

Risk can increase with high stocking density, shared grazing areas, delayed manure cleanup, and introducing new animals without quarantine testing. Even when Lamanema chavezi is uncommon in a region, a herd can still maintain the parasite if infected animals continue shedding eggs. That is why your vet may recommend testing herd mates, not only the llama showing signs.

Diagnosis usually begins with a fecal examination, but the testing method matters. Published llama cases identified eggs using centrifugal flotation in sugar solution, and newer reports support sedimentation/flotation for early detection. In adult camelids, low egg counts are common, so more sensitive methods such as Cornell-Wisconsin double centrifugation or other high-quality camelid fecal techniques are often more useful than a quick in-house screen alone.

Your vet may also recommend bloodwork to look for dehydration, inflammation, protein changes, or evidence of liver involvement. If liver disease is suspected, ultrasound can help assess the liver and bile ducts. In unusual or severe cases, diagnosis may be confirmed with PCR, necropsy findings, or histopathology of liver lesions.

Because camelids can carry more than one parasite at the same time, diagnosis should be interpreted in context. A positive fecal result does not automatically explain every sign, and a negative result does not always rule out early or low-level infection. That is one reason follow-up fecal testing after treatment is often part of the plan.

Prevention works best at the herd level, not only the individual level. Merck recommends routine fecal monitoring in camelids, with many herd programs using fecal flotations about four times a year plus fecal egg count reduction testing to check whether a dewormer is still working. In adult camelids, sensitive methods matter because egg counts may be low even when parasites are present.

Good pasture hygiene helps reduce exposure. Remove manure regularly, avoid overcrowding, keep feed off the ground when possible, and reduce muddy, contaminated loafing areas. New llamas should ideally be quarantined, tested, and discussed with your vet before joining the herd.

Accurate dosing is also important. Underdosing can leave parasites behind and may contribute to resistance. Your vet may recommend weighing animals before treatment rather than estimating. The goal is not routine blanket deworming forever. It is a thoughtful parasite-control plan that matches your herd, your region, and current test results.