References
- Brunsdon , R. V. 1969 . Trichostrongyle worm infection in cattle: ostertagiasis and concurrent infections in dairy calves: seasonal patterns of occurrence, pathology and diagnosis . N.Z. vet. J. , 17 : 161 – 172 .
- Brunsdon , R. V. 1971 . Trichostrongyle worm infection in cattle: further studies on problems of diagnosis and on seasonal patterns of occurrence . N.Z. vet. J. , 19 : 203 – 212 .
- Brunsdon , R. V. 1972 . Inhibited development of Ostertagia spp. and Cooperia spp. in naturally acquired infections in calves . N.Z. vet. J. , 20 : 183 – 189 .
- Herlich , H. 1956 . A digestion method for post-mortem recovery of nematodes from ruminants . Proc. helm. Soc. Wash. , 23 : 102 – 103 .
- Hirschowitz , B. I. 1955 . Pepsinogen in the blood . J. Lab. din. Med. , 46 : 568 – 579 .
- Jarrett , W. F. H. 1966 . “ Pathogenic and expulsive mechanisms in gastro-intestinal nematodes ” . In The Pathology of Parasitic Diseases , Edited by: Taylor , A.E.R. 53 – 53 . Oxford : Blackwell . In
- Jennings , F. W. , Armour , J. , Lawson , D. D. and Roberts, R. 1966 . Experimental Ostertagia ostertagi infections in calves: studies with abomasal cannulas . Am. J. vet. Res. , 27 : 1249 – 1257 .
- Korot'ko , G. F. and Islyamova , M. E. 1963 . Determination of the proteolytic activity of gastric juice, urine and serum . Sb. Nauch. Tr. Andzhansk Med. Inst. , 4 : 114 – 126 .
- Michel , J. F. 1968 . The control of stomach-worm infection in young cattle . J. Br. Grassld Soc. , 23 : 165 – 173 .
- Michel , J. F. 1969 . Observations on the epidemiology of parasitic gastro-enteritis in calves . J. Helminth. , 43 : 111 – 133 .
- Michel , J. F. and Lancaster , M. B. 1970 . Experiments on the control of parasitic gastro-enteritis in calves . J. Helminth. , 44 : 107 – 140 .
- Mylrea , P. I. and Hotson , I. K. 1969 . Serum pepsinogen activity and the diagnosis of bovine ostertagiasis . Br. vet. J. , 125 : 379 – 388 .