The Bacteriology of Farm Water Supplies: A Study of the Colony Count in 72 Hours at 22°

Abstract

The colony count at 22' of farm water supplies from springs and wells waa mainly composed of biochemically inactive, non-pigmented, Gram-negative rods. Water from 8 stream polluted with farmyard sewage showed a similar dominance of Gram-negative rods, but orange or yellow pigmented colonies were more abundant.There were few 37" positive coli-aerogenes bacteria in either the farm water supplies or the sewage polluted stream, and Bact. coli type I waa rare.A high proportion of the bacteria from farm water supplies fermented milk in 3 days at 2 2 O ; a third developed acid, 16% proteolysis and 6.4% ropiness.Contamination of pure spring water with surface soil from a heavily grazed pasture resulted in a hundredfold increase in colony count with aerobic sporing rods replacing Gram-negative rods 88 the dominant organisms, but coli-mrogenes bacteria were absent.

Soft rot Erwinia bacteria in surface and underground waters in southern Scotland and in Colorado, United States

“…In the literature on water bacteriology there are scattered reports of the isolation of what were or could have been soft rot Erwinia spp., particularly in connection with studies on faecal contamination (Bonde 1977), though few workers have fully charactecised their isolates. For example, in studies on the presence of Enterobacteriaceae in farm water supplies in the 1950s, several British workers examined water from wells, springs, ditches, streams, rivers and rain water in storage tanks for pectolytic organisms (Thomas & Thomas 1955;Jones 1956). A few isolates were possibly Erwinia spp.…”

Biological studies of some tussock-grassland soils

“…These diagrams of the overall character of the flora of grassland soil may be contrasted with the results of Taylor (1942) with lake water and of Thomas and Thomas (1955) with farm water supplies. Biochemically the soil flora is more active than the lake water flora but is very similar to the flora recorded by Thomas and Thomas.…”

A Study of Certain Heterotrophic Polarly Flagellate Water Bacteria: Aeromonas, Pseudomonas and Comamonas

“…Reports on water bacteria made by Ward (1897), Boyce & Hill (1900), Taylor (1942), Thomas & Thomas (1955) and Corberi & Solaini (1960) gave no mention of flagellation or motility in the strains studied, while those of Fuller & Johnson (1809), Jordan (190%) and Cornwall (1914) recorded motility but not flagellation. In fact, so far as the author is aware, only one study on the range of bacteria present in surface waters has included an examination of flagellar pattern (Gray, 1951) but neither the method of determination nor the detailed results obtained were recorded.…”