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VetMed Resource

Veterinary information to support practice, based on evidence and continuing education

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Abstract

In 3 groups of 18 Holstein-Fresian calves inoculated with 200 000 and 300 000 L3 in 2 experiments, one of 3 isolates of O. ostertagi was given to each group. Calves in both experiments developed anorexia and diarrhoea; generally calves were more severely affected by the larger inoculum. Patent...

Author(s)
Herlich, H.; Gasbarre, L. C.; Douvres, F. W.
Citation
Veterinary Parasitology, 1984, 16, 3/4, pp 253-260
Abstract

Excretory-secretory products (ESP) isolated from in vitro-grown 3rd- and 4th-stage larvae of O. radiatum inhibited both the in vitro antigen-specific proliferation of keyhole limpet hemocyanin- and ovalbumin-primed lymphocytes and the proliferation induced by the T-cell mitogen concanavalin A. As...

Author(s)
Gasbarre, L. C.; Romanowski, R. D.; Douvres, F. W.
Citation
Infection and Immunity, 1985, 48, 2, pp 540-545
Abstract

Author(s)
Gasbarre, L. C.; Urban, J. F., Jr.
Citation
Federation Proceedings, 1985, 44, 5, pp 1708
Abstract

LDA (limiting dilution analysis) was used to quantitate the local and systemic cellular immune response of cattle after immunization with keyhole limpet haemocyanin (KLH) and infection with Ostertagia ostertagi. The assay measures the proliferative response of bovine T-cells after in vitro ...

Author(s)
Gasbarre, L. C.
Citation
Veterinary Parasitology, 1986, 20, 1/3, pp 133-147
Abstract

Excretory-secretory products (ESP) were collected from in vitro- maintained O. radiatum larvae during the period in which the larvae molt from the 3rd to 4th larval stage. The ESP were used to immunize 13 uninfected calves which were subsequently challenged with 1.7 × 104 infective O. radiatum ...

Author(s)
Gasbarre, L. C.; Douvres, F. W.
Citation
Veterinary Parasitology, 1987, 26, 1-2, pp 95-105
Abstract

Four- to 6-month-old calves raised on clean pastures were allowed to graze for about 30 days on pastures naturally contaminated with Ostertagia ostertagi, Cooperia spp., Haemonchus placei, and Nematodirus helvetianus. The calves were then housed on concrete for 3 weeks before slaughter. At necropsy ...

Author(s)
Murrell, K. D.; Leighton, E. A.; Boswell, B. A.; Gasbarre, L. C.
Citation
Journal of Parasitology, 1989, 75, 3, pp 360-366
Abstract

In order to evaluate whether soluble O. radiatum antigens could induce protective immunity, a soluble fraction was obtained from disrupted adult worms, and this fraction was used to vaccinate calves. The vaccination protocol involved 2 immunizations. The first was administered intramuscularly with...

Author(s)
Gasbarre, L. C.; Canals, A.
Citation
Veterinary Parasitology, 1989, 34, 3, pp 223-238
Abstract

Differences in nematode faecal egg counts from 167 purebred Angus calves born in 1986, and 133 born in 1987 that had been naturally exposed to infection on pasture were analyzed for sire effects. The calves were sired by 26 different bulls, all of which were related. Differences among faecal egg...

Author(s)
Leighton, E. A.; Murrell, K. D.; Gasbarre, L. C.
Citation
Journal of Parasitology, 1989, 75, 4, pp 498-504
Abstract

Author(s)
Gasbarre, L. C.; Leighton, E. A.; Davies, C. J.
Citation
FASEB Journal, Federation of American Societies for Experimental Biology, 1989, 3, 4, pp A1343
Abstract

Previous studies have indicated that host genetics significantly affects the number of gastrointestinal nematode ova in the faeces of calves during their first grazing season. An entire calf crop in Maryland, USA, of approximately 190 animals, was monitored monthly until weaning. A significant...

Author(s)
Gasbarre, L. C.; Leighton, E. A.; Davies, C. J.
Citation
Veterinary Parasitology, 1990, 37, 3-4, pp 257-272

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