Abstract
Several steers, reared in isolation until approximately six months of age, were placed on a small isolated enclosed pasture from late spring to late fall of 1970, 1971 and 1972. The pasture was left vacant and unused during the winters and early springs. The pasture had been used in previous years by cattle, and in the late spring of 1970 was grazed by cattle know to be passing gastrointestinal nematode eggs in their feces. The steers were slaughtered periodically, and the prevalence of nematode species in the abomasum, small intestine, and large intestine, was determined from random samples of up to 100 adult male worms from each segment. The following nematodes were found in the steers in 1971 and 1972 and survived winters on pasture: Ostertagia ostertagi, O. lyrata, Cooperia oncophora, C. mcmasteri, Nematodirus helvetianus and Trichuris discolor. Two nematodes Cooperia punctata and Bunostomum phlebotomum known to be present on pasture in 1970, since they were recovered from the steers in that year, were not found in the steers in 1971 and 1972.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Ayalew L., Gibbs H. C. Seasonal fluctuations of nematode populations in breeding ewes and lambs. Can J Comp Med. 1973 Jan;37(1):79–89. [PMC free article] [PubMed] [Google Scholar]
- BESCH E. D. THE EFFECTS OF TIME AND TEMPERATURE ON THE INFECTIVITY OF THIRD-STAGE LARVAE OF COOPERIA PUNCTATA (TRICHOSTRONGYLIDAE) IN THE DOMESTIC RABBIT, ORYCTOLAGUS CUNICULUS L. Am J Vet Res. 1964 Mar;25:535–537. [PubMed] [Google Scholar]
- Campbell D. J., Diamond D. L., Kingscote A. A. Nematodiriasis in Calves. Can Vet J. 1960 Mar;1(3):119–122. [PMC free article] [PubMed] [Google Scholar]
- DRUDGE J. H., LELAND S. E., Jr, WYANT Z. N., RUST J. W. Winter survival of some cattle parasites on a Kentucky pasture with observations on the effects of low-level phenothiazine treatment. J Parasitol. 1958 Aug;44(4 SECTION):434–438. [PubMed] [Google Scholar]
- Herlich H. The effects of the intestinal worms, Cooperia pectinata and Cooperia oncophora, on experimentally infected calves. Am J Vet Res. 1965 Sep;26(114):1032–1036. [PubMed] [Google Scholar]
- Johnston E. F., Macpherson L. W. An Outbreak Of Acute Parasitic Gastro-Enteritis In A Herd Of Cattle In The Ottawa Valley. Can J Comp Med Vet Sci. 1956 Jun;20(6):203–205. [PMC free article] [PubMed] [Google Scholar]
- ROSE J. H. Some observations on the free-living stages of Ostertagia ostertagi, a stomach worm of cattle. Parasitology. 1961 Nov;51:295–307. doi: 10.1017/s0031182000070542. [DOI] [PubMed] [Google Scholar]
- Slocombe J. O. Abomasal nematodes in cattle in Ontario. Can J Comp Med. 1974 Jan;38(1):18–21. [PMC free article] [PubMed] [Google Scholar]
- Slocombe J. O. Gastrointestinal parasites in cattle in Ontario. Can Vet J. 1973 Apr;14(4):91–95. [PMC free article] [PubMed] [Google Scholar]
- Slocombe J. O. Parasitisms in domesticated animals in Ontario. I. Ontario Veterinary College Records 1965-70. Can Vet J. 1973 Feb;14(2):36–42. [PMC free article] [PubMed] [Google Scholar]
- Smith H. J., Aarchibald R. M. The overwinter survival of ovine gastro-intestinal parasites in the Maritime provinces. Can Vet J. 1965 Oct;6(10):257–267. [PMC free article] [PubMed] [Google Scholar]
- Smith H. J. On the persistence of infective Ostertagia ostertagi, Cooperia oncophora and Nematodirus helvetianus on pastures. Can J Comp Med. 1972 Oct;36(4):333–338. [PMC free article] [PubMed] [Google Scholar]
- Smith H. J., Stevenson R. G. A clinical outbreak of Trichuris discolor infection in stabled calves. Can Vet J. 1970 May;11(5):102–104. [PMC free article] [PubMed] [Google Scholar]
- Williams J. C., Mayhew R. L. Survival of infective larvae of the cattle nematodes, Cooperia punctata, Trichostrongylus axei, and Oesophagostomum radiatum. Am J Vet Res. 1967 May;28(124):629–640. [PubMed] [Google Scholar]