Biomaterial Database

Experiments on inhibited development of Haemonchus contortus and Ostertagia circumcincta in sheep in The Netherlands. 1981

M Eysker

Inhibited development of Haemonchus contortus and Ostertagia spp was studied in sheep. Exposure of infective Haemonchus contortus larvae for five weeks to 15 degrees C or 16 degrees C very effectively induced inhibited development but exposure to lower temperatures was much less effective. Infection with fresh larvae cultured for seven or 12 days at 25 degrees C in the dark resulted only in very low rates of inhibited development. This was not much influenced by the age of the host or the month of infection. Exposure of infective Ostertagia spp larvae for five weeks to 4 degrees C was fairly effective in inducing inhibited development while exposure to 16 degrees C was not effective. On two occasions inhibited development of Ostertagia spp was observed in lambs after a primary infection with fresh infective larvae cultured for seven days at 25 degrees C in the dark. This implies that a conditioning for inhibited development of Ostertagia spp is possible within this seven day culture period.

UI	MeSH Term	Description	Entries
D009426	Netherlands	Country located in EUROPE. It is bordered by the NORTH SEA, BELGIUM, and GERMANY. Constituent areas are Aruba, Curacao, and Sint Maarten, formerly included in the NETHERLANDS ANTILLES.	Holland,Kingdom of the Netherlands
D010029	Ostertagiasis	A disease of herbivorous mammals, particularly cattle and sheep, caused by stomach worms of the genus OSTERTAGIA.	Ostertagiases
D006188	Haemonchiasis	Infection with nematodes of the genus HAEMONCHUS, characterized by digestive abnormalities and anemia similar to that from hookworm infestation.	Haemonchiases
D006189	Haemonchus	A genus of parasitic nematode worms which infest the duodenum and stomach of domestic and wild herbivores, which ingest it with the grasses (POACEAE) they eat. Infestation of man is accidental.	Hemonchus
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012756	Sheep	Any of the ruminant mammals with curved horns in the genus Ovis, family Bovidae. They possess lachrymal grooves and interdigital glands, which are absent in GOATS.	Ovis,Sheep, Dall,Dall Sheep,Ovis dalli
D012757	Sheep Diseases	Diseases of domestic and mountain sheep of the genus Ovis.	Ovine Diseases,Disease, Ovine,Disease, Sheep,Diseases, Ovine,Diseases, Sheep,Ovine Disease,Sheep Disease
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor
D014251	Trichostrongyloidea	A superfamily of nematodes. Most are intestinal parasites of ruminants and accidentally in humans. This superfamily includes seven genera: DICTYOCAULUS; HAEMONCHUS; Cooperia, OSTERTAGIA; Nematodirus, TRICHOSTRONGYLUS; and Hyostrongylus.	Trichostrongyloideas