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OJVRTM
Online Journal of Veterinary Research©
Volume 21(10):688-699, 2017.
Molecular characteristics of P. aeruginosa isolated from human sources and cow milk.
Ahmed
Abdali Jabor Al-Shafee and Mawlood Abbas Ali Al-Graibawi.
College
of Veterinary Medicine, Zoonotic Unit, University of Baghdad, Iraq.
ABSTRACT
Al-Shafee AAJ, Abbas Ali M., Molecular characteristics of P.
aeruginosa isolated from human sources and cow milk, Onl
J Vet Res., 21(10):688-699, 2017. One hundred ten human
ear, eye, wound and burn swabs and 153 cow milk samples were tested for P. aeruginosa isolates. Samples were streaked on
blood and MacConkey agar and suspected colonies
sub-cultured on chromogenic and cetrimide media. Isolates
were identified according to colony morphology, gram staining, conventional
biochemical reactions and analytical profile index 20E (API 20E). PCR assay
confirmed presence of P. aeruginosa and nucleotide sequence of isolates. We found P. aeruginosa in 11.4% (30/263), with 21.8% (24/110) from human samples and
3.9% (6/153) from cow milk. PCR with species specific 16SrRNA gene (956 bp) verified that 100% isolates were P. aeruginosa and
identified P2 and P5 from humans and P27 and P30 from cow milk with 100%
identity for P2, P5, P30 but 99% for P27. Evolutionary taxa for local Iraqi
and global P. aeruginosa species taken from NCBI database provided an optimal tree of 11 nucleotide sequences matching
isolates P2, P5 and P30 with global isolates but different with P27. Results suggest PCR and
sequence analysis confirmed P.aeruginosa
strain differences between humans and cow milk.
Keywords: Pseudomonas aeruginosa, molecular study, 16SrRNA
gene, PCR, nucleotide sequence.
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