Artificial Mixed Infection with Dictyocaulus viviparus and Theileria sergenti in Calves

Effect of infection with lungworms (Dictyocaulus viviparus) on energy and nitrogen metabolism in growing calves.

1. Ten Friesian male calves of about 100 kg and 3 months old were reared similarly and were worm-free. From 13 weeks of age five calves received a dose of 640 infective larvae (L3) of lungworms (Dictyocaulus viviparus) twice weekly for 8 weeks to simulate continuous infection. Animals not infected were fed to the same level as the infected animals (about 1.2-1.3 kg concentrates and 1.4-1.5 kg g...

Acute Phase Proteins in Response to Dictyocaulus viviparus Infection in Calves

Three experiments were carried out to examine the acute phase response, as measured by the acute phase proteins (APP) haptoglobin, serum amyloid A (SAA) and fibrinogen, in calves infected with lungworm, Dictyocaulus vivparus. In addition, eosinophil counts were analysed. Three different dose models were used in 3 separate experiments: 1) 250 D. viviparus infective third stage larvae (L3) once d...

The unpredictable epidemiology of Dictyocaulus viviparus lungworm infection of cattle

Together, helminth parasites are the most important animal health constraint to global ruminant livestock production. Better control of gastrointestinal and lungworm nematodes (and liver flukes) in Irish and UK cattle is a priority to meet the need for food security through efficient livestock production. Persistent acting macrocyclic lactone anthelmintics are convenient to use and highly effec...

Unusual cases of Theileria annulata infection in calves

Immune Cell Responses to the Cattle Lungworm, Dictyocaulus viviparus

The cattle lungworm, Dictyocaulus viviparus, is a parasitic nematode, which can cause severe pulmonary disease. Repeated natural infections result in protective immunity, and a live attenuated vaccine exists. However, live vaccines have several disadvantages, and alternative control methods are needed. Awareness of increasing anthelmintic resistance makes parasite control with reduced reliance ...