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Applied Microbiology|January 1, 1974
Limitations of the use of 5-fluorouracil as a selective agent for the isolation of leptospiraeD R RisJournal of Medical Microbiology|August 1, 1978
Use of hamster antisera in the preliminary differentiation of Leptospira interrogans servars hardjo and balcanicaD R Ris, K L HamelNew Zealand Veterinary Journal|August 1, 1982
An unusual serological response in cattle after use of a commercial leptospiral combined hardjo-pomona vaccineD R Ris, K L HamelVeterinary Immunology and Immunopathology|July 1, 1982
The use of a cathodic antigen in the immunoelectrophoretic serodiagnosis of Echinococcus granulosus in sheepK L Hamel, D R RisResearch in Veterinary Science|September 1, 1987
Use of two polysaccharide antigens in ELISA for the detection of antibodies to Echinococcus granulosus in sheep seraD R Ris, K L Hamel, Z M MackleNew Zealand Veterinary Journal|January 1, 1984
Comparison of an enzyme-linked immunospecific assay (ELISA) with the cold complement fixation test for the serodiagnosis of Brucella ovis infectionD R Ris, K L Hamel, D L LongNew Zealand Veterinary Journal|September 1, 1988
The detection of Mycobacterium paratuberculosis in bovine faeces by isolation and the comparison of isolation with the examination of stained smears by light microscopyD R Ris, K L Hamel, J M AylingPageof 1