Weight gain and reproductive performance of spring-born beef heifer calves intraruminally administered oxfendazole.

H. T. Purvis, J. C. Whittier, S. L. Boyles, L. J. Johnson, H. D. Ritchie, S. R. Rust, Dan B Faulkner, R. P. Lemenager, K. S. Hendrix

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effect of oxfendazole (Synanthic) on weight gain and reproductive performance of spring-born heifer calves was evaluated at five locations (IL, IN, MI, MO, ND). Three hundred thirty-eight mixed-breed beef heifers (293.4 kg) blocked by weight and age were randomly allotted to one of two treatments. Treatment 1 heifers were dewormed via intraruminal injection of oxfendazole. Treatment 2 heifers served as a control. Heifers were comingled during the winter phase in semi-confinement during the period from late January to late May (winter phase). Heifers were sorted by treatment at the beginning of the grazing season (approximately May 24, 1991) and remained separate until the end of the study (approximately July 31, 1991; summer phase). Dewormed heifers received oxfendazole (4.5 mg/kg BW) in late January and again 28 and 56 d after the beginning of the grazing season. Fecal samples were taken every 21 d from January through September and assayed for gastrointestinal parasite eggs. Fecal egg counts were similar across treatments at the beginning of the trial (P = .34). Deworming decreased fecal egg counts throughout the trial. Twenty-eight days after initial deworming a significant treatment effect on fecal egg counts was observed (P < .01). Winter ADG was significantly higher (P < .01) for dewormed heifers than for controls (.60 vs .52 kg, respectively). Summer ADG was not different between treatments. Dewormed heifers were 7.4 kg heavier than controls (P < .05) at the end of the trial. Age of puberty was not affected by treatment (P = .64). First-service conception and final pregnancy rates were not different between treatment.(ABSTRACT TRUNCATED AT 250 WORDS)

Original languageEnglish (US)
Pages (from-to)817-823
Number of pages7
JournalJournal of Animal Science
Volume72
Issue number4
StatePublished - Apr 1994
Externally publishedYes

Fingerprint

oxfendazole
beef cattle
Weight Gain
heifers
reproductive performance
weight gain
calves
fecal egg count
deworming
Ovum
Therapeutics
winter
grazing
summer
puberty
pregnancy rate
Pregnancy Rate
Puberty
Eggs
Parasites

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Purvis, H. T., Whittier, J. C., Boyles, S. L., Johnson, L. J., Ritchie, H. D., Rust, S. R., ... Hendrix, K. S. (1994). Weight gain and reproductive performance of spring-born beef heifer calves intraruminally administered oxfendazole. Journal of Animal Science, 72(4), 817-823.

Weight gain and reproductive performance of spring-born beef heifer calves intraruminally administered oxfendazole. / Purvis, H. T.; Whittier, J. C.; Boyles, S. L.; Johnson, L. J.; Ritchie, H. D.; Rust, S. R.; Faulkner, Dan B; Lemenager, R. P.; Hendrix, K. S.

In: Journal of Animal Science, Vol. 72, No. 4, 04.1994, p. 817-823.

Research output: Contribution to journalArticle

Purvis, HT, Whittier, JC, Boyles, SL, Johnson, LJ, Ritchie, HD, Rust, SR, Faulkner, DB, Lemenager, RP & Hendrix, KS 1994, 'Weight gain and reproductive performance of spring-born beef heifer calves intraruminally administered oxfendazole.', Journal of Animal Science, vol. 72, no. 4, pp. 817-823.
Purvis HT, Whittier JC, Boyles SL, Johnson LJ, Ritchie HD, Rust SR et al. Weight gain and reproductive performance of spring-born beef heifer calves intraruminally administered oxfendazole. Journal of Animal Science. 1994 Apr;72(4):817-823.
Purvis, H. T. ; Whittier, J. C. ; Boyles, S. L. ; Johnson, L. J. ; Ritchie, H. D. ; Rust, S. R. ; Faulkner, Dan B ; Lemenager, R. P. ; Hendrix, K. S. / Weight gain and reproductive performance of spring-born beef heifer calves intraruminally administered oxfendazole. In: Journal of Animal Science. 1994 ; Vol. 72, No. 4. pp. 817-823.
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