A note on potential hazards to animals grazing on pasture improperly treated with sewage sludge

Abstract

Sewage sludge was monitored for the presence of salmonellas after it had been dumped on a pasture so that it formed a number of extensive, thick pats. Although salmonellas were isolated from the sewage sludge, and also from grass and soil beneath the sludge for up to 94 days, they were not isolated from the faeces of grazing horses or surrounding drainage ditches. The results are discussed with regard to the possible hazards resulting from the use of sewage sludge on pasture.

A study of the relative efficiencies of three commercially available dehydrated Rappaport–Vassiliadis media

“…Despite repeated reports of the superior efficiency of RV-medium over selenite and tetrathionate broths (Fricker, Girdwood & Munro, 1983;Fricker 1984a;Vassiliadis, 1983), some workers continue to use the latter two media in preference to RV-medium (e.g. Juven et al 1984;Wray & Callow, 1985). Perhaps the most likely explanation of this is that until recently RV-medium has not been available as a dehydrated product.…”