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Abstract

In the Netherlands, 160 farms were surveyed for fascioliasis by ELISA in Nov. 1983. The sensitivity of the test was estimated at 85% and the specificity at 92%. At the threshold of positivity ≥ 5.0 ETC (=ELISA titre count where 1 corresponds to a titre of 1:20 and a 2 to 1:40 etc.), 14% of the...

Author(s)
Ploeger, H. W.; Boon, J. H.; Plaizier, J. C. B.; Keulen, K. van
Publisher
Koninklijke Nederlandse Maatschappij voor Diergeneeskunde, Utrecht, Netherlands
Citation
IVth International Symposium of Veterinary Laboratory Diagnosticians, 2-6 June, 1986, Amsterdam, Netherlands. Abstracts., 1986, pp 195-198
Abstract

A serological survey of Dictyocaulus viviparus infections in calves was carried out using an enzyme-linked immunosorbent assay. Infection level with D. viviparus was correlated with farm, herd and management characteristics. At least 75% of the herds were infected with D. viviparus. Calves on...

Author(s)
Boon, J. H.; Ploeger, H. W.; Raaymakers, A. J.
Citation
Veterinary Record, 1986, 119, 19, pp 475-479
Abstract

Three groups of eight 3-month-old Friesian calves were orally inoculated with 5000 L3 of Ostertagia spp. and 5000 L3 of Cooperia spp. 3 times/week for 3, 5 and 7 weeks, respectively; 7 calves from each group served as uninfected controls. One week later, 4 of the infected animals from each group...

Author(s)
Kloosterman, A.; Frankena, K.; Ploeger, H. W.
Citation
Veterinary Parasitology, 1989, 33, 2, pp 155-163
Abstract

On 31 farms, blood samples were taken from adult dairy cattle in September 1985, when pastured, and in November-December 1985, when stabled, to assess serum pepsinogen levels and the level of nematode antibody titres. Faecal samples taken in September were examined to establish the presence of...

Author(s)
Ploeger, H. W.; Schoenmaker, G. J. W.; Kloosterman, A.; Borgsteede, F. H. M.
Citation
Veterinary Parasitology, 1989, 34, 3, pp 239-253
Abstract

Author(s)
Ploeger, H. W.; Kloosterman, A.
Citation
Magyar Állatorvosok Lapja, 1989, 44, 5, pp 272-275
Abstract

On 81 farms blood samples were taken from adult dairy cattle, on pasture in October 1986 and after stabling in December 1986, to measure antibody titres against Dictyocaulus viviparus , Cooperia spp. and Ostertagia spp., and Fasciola hepatica, and serum pepsinogen values. Faecal samples, collected...

Author(s)
Ploeger, H. W.; Kloosterman, A.; Bargeman, G.; Wuijckhuise, L. V.; Brink, R. van den
Citation
Veterinary Parasitology, 1990, 35, 1-2, pp 103-116
Abstract

Liveweight of calves on 89 dairy farms in the Netherlands was measured at the end of the grazing season and related per herd to the level of exposure to nematode infection during the grazing season. There were significant between-herd variations in antibody titres against Ostertagia spp., Cooperia ...

Author(s)
Ploeger, H. W.; Kloosterman, A.; Eysker, M.; Borgsteede, F. H. M.; Straalen, W. van; Verhoeff, J.
Citation
Veterinary Parasitology, 1990, 35, 4, pp 307-322
Abstract

Liveweight of calves on 86 dairy farms in the Netherlands was measured at the end of the grazing season and related per herd to the level of exposure to nematode infection estimated in October and December. There were significant between-herd variations in all the serological infection parameters...

Author(s)
Ploeger, H. W.; Eysker, M.; Borgsteede, F. H. M.; Kloosterman, A.; Straalen, W. van; Frankena, K.
Citation
Veterinary Parasitology, 1990, 35, 4, pp 323-339
Abstract

Growth performance of calves was estimated by means of heart girth measurements on 48 farms during winter housing (from December to the end of March) in the Netherlands. Level of exposure to nematode infection was measured by antibody titres, pepsinogen values, and faecal examinations. Ostertagia,...

Author(s)
Ploeger, H. W.; Straalen, W. van; Borgsteede, F. H. M.; Eysker, M.; Kloosterman, A.
Citation
Veterinary Parasitology, 1990, 36, 1-2, pp 45-55
Abstract

Antibody titres against Ostertagia spp., Cooperia spp. and Dictyocaulus viviparus as well as pepsinogen values, reflecting exposure to nematode infection, differed significantly among herds of second-year cattle on 87 farms in the Netherlands. Faecal examinations revealed that gastrointestinal...

Author(s)
Ploeger, H. W.; Kloosterman, A.; Borgsteede, F. H. M.; Eysker, M.
Citation
Veterinary Parasitology, 1990, 36, 1-2, pp 57-70

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