The present study was carried out to isolate of Pseudomonas aeruginosa from the genital tract of some farm
animals in Baghdad city to study the genetic and the ability of these isolates to produce phenazine pigment. For
this purpose 240 vaginal and uterine samples were taken from 20 cows, 20 ewes and 20 goats postpartum. The
result refer to that 203 samples gave positive bacterial growth. Distributed as follows 54 cows, 73 ewes and 76
goats. Depending on cultural, microscopic and biochemical characteristics, 17 isolates of P. aeruginosa were
obtained. Addition to using differential and selective media to study the ability of these isolates to produce
pyocyanin pigment. The results showed that all of P. aeruginosa were produced pyocyanin pigment in various
amounts. Identification of phenazine was done using thin layer chromatography and high performance liquid
chromatography. Results indicated that the compound separated from liquid culture was characterized as a
phenazine. Genetic analysis for P. aeruginosa isolates was conducted to determine the location of genetic
determinants for production of phenazine. Results showed that 8 isolates of P.aeruginosa had one plasmid band
and 3 isolates had two, while 6 isolates had no bands which cured by using 275 μg /ml of ethidium bromide. The
cured cells of isolates were examined for their ability of phenazine production. the cured cells continued to
produce phenazine pigment. Amplification of chromosomal phz genes of isolates were done using PCR with
specific primers. Bands of 1110 bp were characterized as related to the phz genes
محمد جبير مهيدي | Mohammed Jobair Muhaidi | 3551