References
- Al-Quaisy , M.H.K. , Al-Zubaidy , A.J. , Altaif , K.I. and Makkawi , T.A. 1987 . The pathogenicity of haemonchosis in sheep and goats in Iraq:1. Clinical, parasitological and haematological findings. . Vet. Parasitol. , 24 : 221 – 228 .
- Benitez-Usher , C. , Armour , J. , Duncan , J.L. , Urquhart , G.M. and Gettinby , G. 1977 . A study of some factors influencing the immunization of sheep against Haemonchus conforfu wing attenuated larvae. . Vet. Parasitol. , 3 : 327 – 342 .
- Blitz , N.M. and Gibbs. H.C. 1971 . Morphological characterization of the stage of arrested development of Haemonchus contortus in sheep. . Can. J. Zool. , 49 : 991 – 995 .
- Colglazier , M.L. , Enzie , F.D. and Lehman , R.P. 1967 . Strain variation in the response of Haemonchus contortus in sheep and goats given phenothiazine: Efficacy of N.F. and purified products on pure parasitic infections. . Am. J. vet. Res. , 28 : 1711 – 1722 .
- Coop , R.L. 1971 . The effect of large doses of Haernonclrus contortus on the level of plasma pepsinogen and the concentration of electrolytes in the abomasal fluid of sheep. . J. comp. Path. , 81 : 213 – 219 .
- Jarrett , W.F.M. , Jennings , F.W. , McIntyre , W.I.M. , Mulligan , W. and Sharp , N.C.C. 1961 . Studies on immunity to Haemonchus contortus infection — double vaccination of sheep with irradiated larvae. . Am. J. vet. Res. , 22 : 186 – 188 .
- Jambre , L.F. and Royal , W.M. 1976 . A comparison of worm burdens in grazing merino sheep and angora goats. . Aust. vet. .J. , 52 : 181 – 183 .
- Manton , V.J.A. , Peacock , R. , Poynter , D. , Silverman , P.H. and Terry , R.J. 1962 . The influence of age on naturally acquired resistance to Haemonchus contortus in lambs. . Res. vet. Sci. , 3 : 308 – 314 .
- McKenna , P.B. and Watson , T.G. 1987 . The comparative efficacy of four broad spectrum anthelmintics against some experimentally induced trichostrongylid infections in sheep and goats. . N.Z. vet.J. , 85 : 192 – 195 .
- Uete , T. , Wasa , M. and Shimogami , A. 1969 . A simplified method for the determination of pepsinogen in blood and urine. . Chem. , 15 : 42 – 55 .
- Urquhart , G.M. , Jarrett , W.F.M. , Jennings , F.W. , Mclntyre , W.I.M. and Mulligan , W. 1966 . Immunity to Haemonchus contortus infection: Relationship between age and successful vaccination with irradiated larvae. . Am. J. vet. Res , 27 : 1645 – 1648 .
- Watson , T.G. 1986 . Susceptibility of kids and lambs to BZ-resistant Haemonchus conforfus isolated from a goat farm in Northland. . N.Z. J. Zool. , 13 : 416 – 416 .