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Browsing 1991 Onderstepoort Journal of Veterinary Research, Volume 58, 1991 by Author

Browsing 1991 Onderstepoort Journal of Veterinary Research, Volume 58, 1991 by Author "Bragg, R.R. (Robert Richard)"

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Health status of salmonids in river systems in Natal. I. Collection of fish and parasitological examination

Bragg, R.R. (Robert Richard); Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)

A detailed microbiological and parasitological survey of salmonids and indigenous fish in the upper reaches of selected river systems in Natal was undertaken. Fish were collected from the rivers by electro-fishing, from ...
Health status of salmonids in river systems in Natal. II. Isolation and identification of viruses

Bragg, R.R. (Robert Richard); Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)

A total of 678 fish from 26 different sites along 8 river systems was examined for the presence of trout viruses. No isolations of any viruses were made from any fish collected from these systems in Natal during this study. ...
Health status of salmonids in river systems in Natal. III. Isolation and identification of bacteria

Bragg, R.R. (Robert Richard); Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)

Both pathogenic and non-pathogenic bacteria were isolated from fish, both salmonid and non-salmonid, from selected river systems in Natal. Pasteurella pisicida was isolated for the first time from fish in South Africa. The ...
Isolation and identification of Adenovirus 127, the causative agent of egg drop syndrome (EDS), from commercial laying hens in South Africa

Bragg, R.R. (Robert Richard); Allwright, D.M.; Coetzee, L.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)

A drop in egg production associated with loss of pigment and soft-shelled eggs was experienced on a farm in the Western Cape. Investigations revealed high levels of antibodies against adenovirus 127, the causative agent ...

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Browsing 1991 Onderstepoort Journal of Veterinary Research, Volume 58, 1991 by Author "Bragg, R.R. (Robert Richard)"

Browsing 1991 Onderstepoort Journal of Veterinary Research, Volume 58, 1991 by Author "Bragg, R.R. (Robert Richard)"

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