Results 191 to 200 of about 17,460 (230)

Haemonchus contortus

2016
R. Laing, A. Martinelli, A. Tracey, N. Holroyd, J.S. Gilleard, J.A. Cotton   +5 more
  +4 more sources

Hypergastrinaemia of sheep infected with Haemonchus contortus

Research in Veterinary Science, 1988
Radioimmunoassay of plasma gastrin has shown that a hypergastrinaemia occurs in yearling sheep, after infection with 10(6) infective third stage larvae of Haemonchus contortus. Plasma gastrin concentrations began to rise two to four days after infection, that is, at about the same time as, or slightly before, the abomasal pH was observed to increase.
C D, Nicholls, D L, Lee, T E, Adrian, S R, Bloom, A D, Care   +4 more
openaire   +2 more sources

Haemonchus contortus resistance to monepantel in sheep

Veterinary Parasitology, 2015
In a sheep farm in the Netherlands with a suspected Haemonchus contortus resistance to monepantel (Zolvix®, Novartis Animal Health), a fecal egg count reduction test was carried out in two groups of lambs, according to the method of the World Association for the Advancement of Veterinary Parasitology.
R, Van den Brom, L, Moll, C, Kappert, P, Vellema   +3 more
openaire   +2 more sources

Haemonchus contortus: Genetically determined polymorphism in females

Experimental Parasitology, 1971
Abstract Studies were made on the genetic constitution of the different morphologic types of females of Haemonchus contortus. Strains with linguiform or knoblike females were crossed and the males of these strains were crossed also with smooth-bodied females. It was concluded that the morphologic diversity of the female H.
openaire   +2 more sources

Development of a vaccine against haemonchus contortus

Parasitology Today, 1993
Haemonchus contortus is an economically important nematode parasite of sheep and the occurrence worldwide of strains resistant to anthelmintic chemicals has emphasized the need to develop a vaccine against it. Here, Ed Munn describes the approach to this problem adopted in his laboratory.
openaire   +2 more sources

Haemonchus contortus: Enzymes

Experimental Parasitology, 1970
Marvin B. Rhodes, Donald L. Ferguson, Connell L. Marsh   +2 more
openaire   +1 more source

Haemonchus contortus: Enzymes. II. Fructose diphosphate aldolase

Experimental Parasitology, 1972
Abstract Soluble extracts were prepared from adult male and female Haemonchus contortus by differential centrifugation. This extract was fractionated DEAE-cellulose, CM-cellulose, and by sucrose-density-gradient centrifugation. A 20-fold purification from the crude soluble extract was achieved resulting in a preparation having an activity of 5.46 ...
openaire   +2 more sources

Hybridization of Australian Haemonchus placei (place, 1893), Haemonchus contortus cayugensis (Das & Whitlock, 1960) and Haemonchus contortus (Rudolphi, 1803) from Louisiana

International Journal for Parasitology, 1981
Abstract There were distinct ecotypie differences in the ability to develop to third stage larvae at a constant 11 or 13°C for two weeks. H. conforms cayugensis could develop at both 11 and 13°C; H. contortus from Louisiana could develop at 13°C but not 11°C and H. placei could not complete development at either temperature.
openaire   +2 more sources

Variability in Haemonchus contortus larvae

2021
Coprological analysis allow the identification of parasitism of ruminants by trychostrongylid but not to species level. In order to know species implicated eggs must be cultured and larvae must develop on coproculture and mature to infective stage of L3.
openaire   +1 more source

Levamisole-resistant Haemonchus contortus in goats

Veterinary Record, 1992
C L, Yadav, R P, Uppal
openaire   +2 more sources