Effect of season on gastrointestinal nematode infection in Saudi Arabian camels (Camelus dromedarius)

摘要

Examination of the abomasum and intestine of 240 camels for the presence of adult nematodes was carried out during a 12 months period. Gastrointestinal nematodes including Haemonchus longistipes, Parabronema skrjabini, Nematodirus spp and Trichurisglobulosa were the most frequently encountered worms in Saudi Arabian camels throughout the different seasons of the year. Haemonchus longistipes and-Parabronema skrjabini were found in the abomasum while Nematodirus dromedarii, Nematodirus spathiger andTrichuris globulosa were collected from the intestines. Haemonchus longistipes, however, showed highest incidence reaching 46.15 percent during the rainy season and highest worm-burden obtained from a single infected camel. Haemonchus 3rd stage infective larvae were detected in herbage during the rainy season with an intensity of 40 larvae per one kilogram of dry sample collected from the grazing areas of dromedary. The abomasal parasites occurred more frequently with relatively high incidence during the wet season and the intestinal ones during the dry season.