Main Subjects : Animal Bacteria

Molecular Analysis of ompA Gene Pasteurella multocida Indonesia Local Isolates

A. T. Soelih Estoepangestie; Arini Rahmi Dewi; Suwarno Suwarno; Didik Handijatno; Rahaju Ernawati; Wiwiek Tyasningsih

Iraqi Journal of Veterinary Sciences, In Press
DOI: 10.33899/ijvs.2019.125934.1191

The aim of this research was to analyze ompA molecular gene of Pasteurella multocida buffalo isolate and bovine isolate from Nusa Tenggara Timur, Indonesia and Katha strain isolate from Haemorrhagic Septicemia Vaccine. Determinant of P.multocida local isolates ompA gene amplification sequencing PCR then conducted to see the sequence of nucleotide sequences of ompA gene. The results of PCR amplification showed an amplicon of 559 bp of all isolates. The homology analysis result of the isolates ranged from 93 – 100% with 13 P.multocida isolates from GeneBank, and phylogenetic tree analysis shows that buffalo isolate were closely related to Katha strains, Iran, India and China isolate. Whereas bovine isolate far enough with buffalo and Katha strain isolate. Nucleotide sequences were compared to amino acids then by the method of Kolaskar and Tongaonkar antigencity predicted antigens in P.multocida. Epitope predictions from local isolates and Katha strain were found in five peptides: QVSPVFAG, IPELALRVEYQ, GQSVYVPEVVSKT, LKSASVAVAG, and ANYLVAKG .

Evaluation the safety and synergistic effect of NiFe2O4 Nanoparticles with antibiotic against pseudomonas aeruginosa

hala ail majeed; Heba Younis Khalef; Halah Abdulkhaleq Awadh; Bashar Sadeq Noomi; Nihad Abdul-Hussain jafar; Khaild Ahmad Hadi

Iraqi Journal of Veterinary Sciences, In Press
DOI: 10.33899/ijvs.2020.126298.1294

Antimicrobial resistance currently impedes and threatens effective prevention and treatment of the continually expanding range of infections caused by bacteria. This study aimed to identify the bacterial causes of wound infection among animals and using of antibiotic/nanoparticles mixture as a new attempt for the treatment of wound infection induced in rats. For this purpose, 112 wound infection cases in different animal types (36 sheep, 21 goats, 12 cows, 4 horses, 8 dogs, 9 rabbits, 7 genies pigs, 15 rats) were studied for bacterial isolation. The predominant bacterial isolate (Pseudomonas aeruginosa) were tested for its sensitivity to antibiotics and nanoparticles (CoFe2O4 and NiFe2O4) in vitro using MIC method. Also wound infection induced in rats and the effect of nanoparticles/antibiotics mixture were tested in vivo.
The results showed that pseudomonas aeruginosa was the predominant bacterial type that caused wound infection. The MIC of NiFe2O4 and CoFe2O4 nanoparticles were 32 µg /ml and 16 µg /ml respectively. A clear synergistic effect of antibiotic/ nanoparticles as antibacterial were noticed which appear as decrease in MIC and increase of inhibitory diameter zone. According to result of RAPD test, nanoparticles effect on genetic material of P. aeruginosa observed as appearance/disappearance of bands, increase in thickness and clarity of bands.

Molecular Fingerprinting of Methicillin Resistant Staphylococcus aureus Strains Isolated from Human and Poultry in Duhok, Iraq

Hishiyar A Hado; Mahde S Assafi

Iraqi Journal of Veterinary Sciences, In Press
DOI: 10.33899/ijvs.2020.126375.1310

Methicillin-resistant Staphylococcus aureus (MRSA) has been recently identified in poultry and farm workers. The aim of this work was to investigate the epidemiological relatedness of MRSA among chickens and farmworker. MRSA isolates (n=50) from human (n=14) and from chikens (n=36) were tested for molecular epidemiological relatedness between human and poultry. RAPD-PCR was carried out for fingerprinting of MRSA isolates genome. Seven genotypes group (A-G) have been identified. All human MRSA were belonging to genotype A. Whereas, chickens MRSA isolates was belonging to different genotype patterns groups (A-G). To conclude, human MRSA was belonging to one genotype pattern but the chickens MRSA strains were belonging to seven genotypes. The genotype pattern A was the most dominant among all MRSA isolates. It is possible that the chickens play an important role for the human exposure to MRSA by direct contact. Further studies are required to address the relatedness between human and chicken MRSA.

Genetic detection to Aeromonas hydrophila proteolytic activity in milk samples (cows, buffaloes and goats) in Basra governorate

Rawa B Banay

Iraqi Journal of Veterinary Sciences, 2020, Volume 34, Issue 2, Pages 253-258
DOI: 10.33899/ijvs.2019.125888.1174

This study aim is to determine the incidence and the virulence of Aeromonas hydrophila in raw milk, randomly collected from Basra governorate by using of polymerase chain reaction (PCR) technique. In this study, the total number of raw milk samples collected from cows, buffaloes and goats that kept from different the regions of Basra governorate were 90 samples. The PCR technique is modern method which regarded as a reliable tool to detect virulent gene of the A. hydrophila isolates. The PCR assays using the primers sets SerAh-F and SerAh-R resulted in the amplification of 650-bp bands from the targeted proteases gene of the A. hydrophil. The result of the present study showed that the results of PCR concerning the proteolytic activity of A. hydrophila in the tested raw milk samples according to animals' source. The higher percentage of the proteolytic activity was found in the cow's raw milk samples 40% and in the buffalo's milk samples was 26.7% while, the proteolytic activity did not find in the goat's milk samples. The association between the source of the milk sample and proteolytic A. hydrophila positive results was considered to be statistically highly significant. The higher percentage of the A. hydrophila isolates found in the raw cow milk was 40%, and the A. hydrophila isolates found in the raw buffalo milk was 26.7%, while, the A. hydrophila isolates did not find in the goat milk.

Bioremediation of lead and cadmium and the strive role of Pediococcus pentosaceus probiotic

Raghad Jaafar

Iraqi Journal of Veterinary Sciences, 2020, Volume 34, Issue 1, Pages 51-57
DOI: 10.33899/ijvs.2019.125581.1092

Consumption of food and water contaminated with heavy metals poses a huge threat to the life. Both of Lead (Pb) and Cadmium (Cd) are heavy metals and important environmental pollutants. Away from traditional treatments, the current study aims to adopt probiotic bacteria Pediococcus pentosaceu to treat heavy metal pollution. Present results indicated a good probiotic property of P. pentosaceus, where they were able to survive pH range from 3-9, during incubation periods 3 and 24 hours, and bile salt range 0.15-0.5% for the same period. The number of bacteria in gastric (pH 3) and intestinal juices (pH 8) after 24 hours of incubation was 390 and 205, respectively. Bacteria showed an inhibitory effect against pathogenic bacteria Salmonella sp. The antibiotic susceptibility test revealed them resistant to clindamycin, intermediate resistant against benzylpenicillin, ampicillin, and their sensitivity to the rest tested antibiotics. Isolated bacteria identified based on their morphology, biochemical characteristic in addition to the use of automated instrument for bacterial identification (Vitek II), and depending on the results bacteria were identified as P. pentosaceus. In bioremediation study, the lowest inhibitory concentration of lead and cadmium and (MIC) was done, followed by assay the removal capacity by P. pentosaceus, using atomic absorption spectrometry (AAS) analysis. Bacteria show high MIC (1800 and 150 ppm) for Pb and Cd respectively. With removal efficiency for Pb 62.10-68.39% in the concentrations 25 and 50 ppm, respectively, and for Cd 52.71-11.25% in the same concentrations. Depending on the present finding probiotic bacteria (P. pentosaceus) can apply in the bioremediation of heavy metals in the fish ponds when contamination occurs, in addition to their tradition used as safety additive to prevent fish disease and an enhancement agent .Finally the isolation of these bacteria from fish ponds can be considered as a good indicator for a healthy state of fish ponds in the studied area.

Detection of Mycobacterium paratuberculosis in raw cow’s milk using polymerase chain reaction (PCR) technique

Ihsan M. Ahmed; Raad A. Al-Sanjary; Haiffa H. Alkazaly

Iraqi Journal of Veterinary Sciences, 2020, Volume 34, Issue 1, Pages 83-86
DOI: 10.33899/ijvs.2019.125556.1075

Paratuberculosis or Johne’s disease is a chronic debilitating disease mainly infects ruminants and caused by Mycobacterium paratuberculosis. Previous serological studies in Mosul city confirm the presence of positive reactants for paratuberculosis in cattle. However, culture methods to confirm the disease need a long incubation period and also special media. Raw cow’s milk is considered as potential source for transmission of M. paratuberculosis in cows’ herds. Accordingly, this study aimed to detect the presence of M. paratuberculosis specifically in the raw cow’s milk using polymerase chain reaction (PCR) technique as a rapid, sensitive and reliable method. A total of 50 samples of raw cow’s milk were collected from cows suffering from emaciation and unresponsive to antibiotic treatment. All the samples were subjected to DNA extraction and direct amplification PCR. The results showed that 3 (6%) out of 50 milk samples were positive for M. paratuberculosis. This is the first study in Mosul city that confirms the presence of M. paratuberculosis in raw cow’s milk using PCR technique. In conclusion, raw cow’s milk could be an important source for M. paratuberculosis infection in dairy cows, and also PCR technique could be helpful in rapid diagnosis of paratuberculosis.