Background: Toxin-producing Shiga Escherichia coli has been identified as a new foodborne pathogen that poses a significant health risk to humans. Shiga toxin-producing Escherichia coli can be found in raw cow milk and its derivatives. A small number of Escherichia coli strains that produce shiga toxin are pathogenic. Aim of study: The study aimed to see if there were any virulence genes in 50 milk samples that were typical of Entero-haemorrhagic E. coli and evaluate the Myrtus communis effects on these bacteria. Materials and Method: Milk samples were used to isolate E. coli bacteria (n= 27), biochemically analyzed, and genetically screened for virulence genes using a multiplex (PCR). The hydro-alcoholic extraction of Myrtus communis leaves was tested at four strengths, ranging from 20-50 mg/ml. Results: The findings of the molecular profile indicated that (stx2) was found in 11 (40.7%),(hlyA) in 13 (48.2) and eae genes in 9 (33.3) of E. coli isolate, respectively. Treatment with an extract of this plant at a dosage of 50 mg/ml had the highest effect on Escherichia coli, which was significantly different from all other treatments. Conclusions: The virulence genes shigatoxin-2 (stx2), intimin (eae), and entero-hemolysin (hlyA) were found in Strains of E. coli isolated from milk, according to the findings of this study.
A total of sixty raw milk samples were collected from (street vendors and shops) from Baghdad city, Iraq. The samples were inoculated into peptone water and, then, subcultured onto MacConkey agar and Blood agar. Identification of isolates was confirmed by microscopic examination, cultural characteristic, biochemical tests, Vitek (VITEK®2 system), and Biolog GN substrate reactions followed by 16S rRNA and specific genes sequencing. Of 60 raw cow’s milk samples, Providencia spp. were identified only in 4 samples (6.67%) and P. rettgeri was the most common, 2/4 (50%), followed by P. stuartii and P. vermicola, 1/4 (25%). Antimicrobial susceptibility tests were conducted against ten antibiotics by the disc diffusion method. All Provid
... Show MoreThe objective of study was determining the most prevalent Salmonella spp. and their antimicrobial susceptibility in broilers and laying chickens and their feed and drinking water in five chicken farms in Karbala, Iraq over the period from August to October 2020. A total of 289 samples, including 217 cloaca swabs, 46 water and 26 feed samples were collected. Salmonella spp. was identified firstly by routine diagnostic methods, followed by applying the API 20E kit, the Vitek2 system, and serology. There was significant differences in Salmonella prevalence among different types of samples, mainly cloaca swabs reported a high isolation rate (21.7%). In contrast, feed samples were completely free of contamination. The highest rate of isolation w
... Show MoreRaw milk is subjected to various physical, chemical and biological pollutants due to produce, a transporting and marketing processes. The current study was designed to examine raw milk samples which were collected from different locations of Iraq. The highest mean value of Pb content [1.801±0.311 ppm] was recorded while the lowest mean value [0.941±0.104 ppm]. The highest mean value [1.532±0.124 ppm] and gave the lowest mean value [0.063±0.044 ppm] of Cd content. This study has the highest mean value of Cu content was [0.931±0.092 ppm] and but the lowest mean value was [0.308±0.029 ppm]. Metals contents of raw milk in this study showed higher than standards of the International Dairy Federation [IDF].
IA Ali, FK Emran, DF Salloom, Annals of the Romanian Society for Cell Biology, 2021
Three hospitals were chosen for the present (Maternity hospital, Raperin hospital and Rhizgari hospital) survey within Erbil city, 36 water samples were collected at regular monthly interval periods beginning at January to December 2012. Microbial analysis was done by selective medium and biochemical tests and the isolated bacteria from those hospitals were Eshcerichia coli, Acinetobacter lowffii, Klebsiella pneumoniae, Moraxilla spp., Salmonella Typhi, Citrbtobacter freundii, Vibrio fluvials, Acinetobacter haemolyticus, Weeksella zoohelcum, Pasteurella multicida, and Pseudomonas aeroginosa. E. coli isolates were subjected to antimicrobial susceptibility testing. In vitro activities of 10 different antibiotics against E. coli isolates we
... Show MorePathogenic bacteria from samples of Al-Rystimya municipal wastewater treatment plant(third expansion)were isolated and identified .Samples were collected from the final disposal point at Dyala River. The duration of this study about five months from august up to December 2001 .The study was Focused upon pathogenic bacteria which have bad influency on health especially acute diarrhea which transferred by water. The bacterial species is isolated were: Escherichia coli , Enterobacter aerogenes , Shigella sp , Salmonella sp , Klebsiella sp, Pseudomonus sp, Aeromonus sp, and Vibrio cholera, Clostridium perifringens. Also some of the chemical and biological characteristics of the wastewater like COD, BOD,TSS, and total values were 660 ,450 ,65
... Show MoreNanotechnology is a continually expanding field for its uses and applications in multiple areas i.e. medicine, science, and engineering. Biosynthesis is straightforward, less-toxicity, and cost-effective technology. TiO2 NPs biosynthesis has attained consideration in recent decades. In this study, probiotic bacteria were isolated from cow’s raw milk samples, and then were identified by using the Vitek2 system; as Leuconostoc spp. included Leuconostoc mesenteroides subsp. mesenteroides (Leu.1), Leuconostoc mesenteroides subsp. cremoris (Leu.4), and Leuconostoc pseudomesenteroides (Leu.14). All Leuconostoc spp. isolates showed an ability for TiO2 NPs bio-production, after being incubated at anaerobic conditions (30 o C/ 24 h) in DeM
... Show MoreThe study designed to determine the distribution of a major important food pathogens including Staphylococcus aureus , Listeria monocytogenes, E. coli O157:H7 and Salmonella spp from raw beef and lamb meat by using multiplex pcr . A total of 90 raw beef and lamb meat samples were collected from different butcher's shops in Al-Karkh side of Baghdad city and analyzed for the presence of these types of bacteria and their susceptibilities to some antibiotics was investigated ,the results showed that the prevalence of S. aureus (5.6%), L. monocytogenes (3%), E. coli O157:H7 (7.8 %) and Salmonella spp (5.6%) from the total samples .The result of the susceptibility test showed that S. aureus isolates were susceptible to Amikacin (80%) ,while L.
... Show MoreThe main aim of this study was to molecular identification and determine the antagonistic impact of rhizosphere Trichoderma spp. against some phytopathogenic fungi, including (Magnaporthe grisea) pyricularia oryzae, Rhizoctonia solani and Macrophomina phasolina. Four Trichoderma isolates were isolated from rhizosphere soils of the different host plants in different locations of Egyptian governorates. The morphological characterization of isolated Trichoderma as well as using of (ITS1-5.8S-ITS2) ribosomal gene sequence acquisition and data analyses. By comparing the results of DNA sequences of ITS region, the fungi represented one isolate were positively identified as T. asperellum (1 isolate T1) and one as T. longibrachiatum (1 isolate T2)
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