The effect of high and low dose Theileria parva infection on the reproductive function of Boran/Friesian heifers.

The effect of high and low dose Theileria parva infection on the reproductive function of Boran/Friesian heifers. Research Abstract Details 

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The effect of high and low dose Theileria parva infection on the reproductive function of Boran/Friesian heifers. Abstract Text:

R M Rumberia,R M Eley,A S Young,A C Rowland,E D Watson,

Two separate experiments were carried out to find the effect of infection with low and high doses of Theileria parva sporozoites on the cyclical status of Boran/Friesian cross heifers. In each experiment, ten heifers were infected and another four heifers acted as controls. Routine monitoring of estrous behavior, determination of serum progesterone concentrations and palpation of the ovaries per rectum were used to assess the cyclical status of each animal. Two and eight animals died in the T . parva low (TpL) and high (TpH) dose experiments, respectively. Five of eight recovered animals in the TpL group cycled regularly postinfection, while three others had extended periods of ovarian dysfunction postinfection. Both infected and recovered animals in the TpH-group similarly had extended periods of ovarian dysfunction postinfection. All controls in both experiments cycled regularly throughout the study period. Differences in cyclical status were not related to the febrile response, parasitological or hematological differences. The animals that continued to cycle throughout lost the least amount of weight. Animals that stopped cycling lost between 16 and 29% of their initial body weights postinfection. In conclusion, this study confirmed previous anecdotal evidence that theileriosis has an adverse effect on reproduction. Results of this study suggested that this was as an indirect result of weight loss associated with infection and not directly attributed to pathology of target organs.

The effect of high and low dose Theileria parva infection on the reproductive function of Boran/Friesian heifers. Publishing Authors By Initials

RM Rumberia,RM Eley,AS Young,AC Rowland,ED Watson,

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The effect of high and low dose Theileria parva infection on the reproductive function of Boran/Friesian heifers. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 40

Page Numbers: 977-86

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Nov

YEAR: 1993

The effect of high and low dose Theileria parva infection on the reproductive function of Boran/Friesian heifers. Information

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LANGUAGE: eng

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Grant and Affiliation Information for The effect of high and low dose Theileria parva infection on the reproductive function of Boran/Friesian heifers.

AFFILIATION: National Veterinary Research Centre Muguga Kenya Agricultural Research Institute P.O. Box 32, Kikuyu, Kenya.

Country: United States

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MEDLINETA: Theriogenology

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