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Toxigenicity and Antimicrobial Resistance of Bacillus cereus Isolated from Raw and Pasteurized Milk
Faculty
Veterinary Medicine
Year:
2019
Type of Publication:
ZU Hosted
Pages:
Authors:
Salah Fathy Ahmed Abdelaal
Staff Zu Site
Abstract In Staff Site
Journal:
Advances in Animal and Veterinary Sciences Zagazig University, Egypt
Volume:
Keywords :
Toxigenicity , Antimicrobial Resistance , Bacillus cereus Isolated from
Abstract:
Bacillus cereus (B. cereus) is an aerobic spore-forming bacterium that has a great public health hazards due to its high distribution in the environment, especially in dairy products in addition to its production to toxins. A total of 25 each of raw and pasteurized milk samples were examined for the presence of B. cereus. Microscopic examination, biochemical tests followed by detection of virulence genes and the antimicrobial susceptibility patterns of recovered B. cereus isolates were performed. From 37 samples that yielded bacillus like growth, there were 15 positives for B. cereus group. All Gram-positive B. cereus isolates were positive for glucose utilization test but were negative for indole test. The distribution of emetic cereulide gene (ces) among the examined isolates was 66.67% (10 ̸ 15), while the enterotoxigenic non haemolytic gene (nhe) was not detected in any of the tested isolates. B. cereus isolates showed an absolute resistance to penicillin (10 U) (100%), followed by ampicillin (10 mg) (93.33%), cefoxitin (30 mg) and amoxicillin (20 mg) (80% each). The isolates were susceptible to enrofloxacin (5 mg) and erythromycin (15 mg) (100 % each), vancomycin (30 mg) (93.33%) and doxycycline (30 mg) (80%). In conclusion, the presence of toxigenic and resistant B. cereus in raw milk and pasteurized milk samples indicates a potential risk to food safety and, therefore, monitoring of the dairy items is suggested.
Author Related Publications
Salah Fathy Ahmed Abdelaal, "Presence and Activity of Psychrotrophic Bacteria in Raw Cow's Milk and Some Dairy Products.", zagazig vetrinary, 2008
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Salah Fathy Ahmed Abdelaal, "MRSA detection in raw milk, some dairy products and hands of dairy workers in Egypt, a mini-survey", Elsevier, 2013
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Salah Fathy Ahmed Abdelaal, "المحتوي الأولي لبقايا المعادن الثقيلة في لبن الأبقار الخام و توزيعها في بعض منتجات الألبان.", مجلة الزقازيق الطبية البيطرية 2005م, 2005
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Salah Fathy Ahmed Abdelaal, "تواجد الميكروبات المحبة للبرودة في اللبن المباع بحافظة الشرقية.", مجلة الزقازيق الطبية البيطرية 2005م., 2005
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Salah Fathy Ahmed Abdelaal, "تواجد الميكروبات المحللة للبروتين في اللبن وبعض منتجاته.", مجلة الزقازيق الطبية البيطرية 2005م, 2005
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Department Related Publications
Salah Fathy Ahmed Abdelaal, "Presence and Activity of Psychrotrophic Bacteria in Raw Cow's Milk and Some Dairy Products.", zagazig vetrinary, 2008
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Mohammed Ezzat Ahmed Elsayed , "Characterization of different food‐isolated Enterococcus strains by MALDI‐TOF mass fingerprinting", USC-Spain, 2013
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Mohammed Ezzat Ahmed Elsayed , "Genetic discrimination of food-borne pathogenic and spoilage Bacillus spp. based on three housekeeping genes", Department of Analytical Chemistry, Nutrition and Food Science, School of Veterinary Sciences/College of Biotechnology, University of Santiago de Comp, 2015
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Eman Nabil Abdelfatah Mohammed, "Assessment of heavy metals content of some types of edible eggs in Sharkia, Egypt", First International Conference of Impact of Environmental Hazards on Food Safety, 2014
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