in order to detect hydrogen cyanide gene and to determine pseudomonas fluorescent efficiency in producing hydrogen cyanide for controlling the growth of rhizoctonia solanipathogen (the causal agent of sugar beet root and crown rot), samples were collected from sugar beet rhizosphere in sabzevar fields. after soil sampling and purification, 31 pseudomonas spp. isolates were separated on specific...

Milk spoilage is caused by the presence of proteolytic enzymes produced by Pseudomonas spp. during storage at low temperatures. The aim of this study was to identify Pseudomonas spp. in raw milk and investigate their associated proteolytic properties at low temperatures. Raw milk samples (n = 87) were collected from 87 bulk tanks in Shaanxi Province in China. Pseudomonas spp. were identified us...

The formation of bacterial spoilage communities in food is influenced by both extrinsic and intrinsic environmental factors. Although many reports describe how these factors affect bacterial growth, much less is known about interactions among bacteria, which may influence community structure. This study investigated interactions among representative species of bacteria isolated from vacuum-pack...

A new medium, pseudomonas selective isolation agar, was developed to isolate Pseudomonas spp. from water. It consists of 350 micrograms of nitrofurantoin per ml and 2 micrograms of crystal violet per ml in a nutrient agar base. It is more selective for Pseudomonas spp. than are available commercial media. Its ingredients are inexpensive and readily available, and it is easy to prepare.

Microbial agents of tomato spoilage in Onitsha metropolis, Nigeria were investigated. A total of 80 tomatoes were sampled, out of which 40 were fresh healthy intact tomatoes and the other 40 were spoilt tomatoes sold in 4 local markets within the zone. They were cultured on blood agar, MacConkey agar, tomato juice agar and Sabourand dextrose agar. No organism was isolated from fresh healthy int...

A total of 258 respiratory tract specimens from patients with cystic fibrosis were inoculated onto nine different plated media, and the rates of recovery of potential pathogens were compared. Media included sheep blood agar, enriched chocolate agar, MacConkey agar for gram-negative bacilli, chocolate agar containing bacitracin for Haemophilus spp., bromcresol green agar for yeasts, cetrimide ag...

Results of minimal inhibitory concentration tests with a diversity of bacterial strains showed that 9-chloro-9-(4-diethylaminophenyl)-10-phenylacridan (C-390) inhibited the growth of all microorganisms tested (other than Pseudomonas aeruginosa) at 25 microgram/ml or less, whereas MICs obtained for P. aeruginosa ranged from to to greater than 100 microgram/ml. Therefore, C-390 was evaluated as a...

broomrape (orobanche spp.) is one of the most serious weed pathogen on many dicotyledonous plants such as tomato, cucumber, melon, tobacco and others. this weed parasite caused serious problem in tomato cultivation fields, especially in north west iran. some isolates of fusarium spp. and pseudomonas fluorescens are known as effective biological agents in biocontrol of this weed. in order to fin...

A total of 232 isolates of Enterobacteriaceae and 19 Pseudomonas species were tested on bile-esculin-agar. Only the Klebsiella-Enterobacter-Serratia group produced blackening of the medium.