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Propidium monoazide conventional PCR and DNA sequencing: detection of negative culture bacterial pathogens causing subclinical mastitis
Faculty
Veterinary Medicine
Year:
2020
Type of Publication:
ZU Hosted
Pages:
1595-1605
Authors:
Marwa Ibrahim Ibrahiem Abdelhamied
Staff Zu Site
Abstract In Staff Site
Journal:
Journal of Applied Microbiology . Wiley
Volume:
128
Keywords :
Propidium monoazide conventional , , , sequencing: detection , negative
Abstract:
Aims: This study was conducted to early detect the negative culture bacterial pathogens causing subclinical mastitis for the fast diagnosis of the disease and the reduction of some milk-transmitted pathogenic bacteria to human consumers. Methods and Results: A total of 171 positive California mastitis test (CMT) milk samples collected from asymptomatic dairy cows in Sharkia Governorate, Egypt were examined by conventional bacteriological methods. The obtained results revealed that Streptococcus species (772%), followed by Staphylococcus species (486%) and Escherichia coli (257%) were the most predominant bacterial pathogens isolated from positive culture milk samples, whereas Enterobacter and Pseudomonas species were the lowest ones (12%, for each). Herein, 13 (7.6%) negative culture milk samples were subjected to propidium monoazide (PMA) conventional PCR assay, followed by DNA sequencing of purified PCR amplicons. Sequence analysis identified seven different types of negative culture bacterial pathogens comprising as following; 4 Enterococcus hirae, 2 Bacillus cereus, 2 Staphylococcus aureus, 1 Bacillus mycoides, 1 Bacillus subtilis, 1 Enterococcus faecium and 1 Escherichia coli. Conclusions: All the detected negative culture bacterial pathogens by PMAPCR assay, followed by DNA sequencing were incriminated in causing subclinical mastitis disease and had serious implications on human public health through consumption of milk contaminated with those recovered bacterial pathogens. Significance and Impact of the Study: The used methods could be useful in the routine detection of negative culture bacterial pathogens present in milk and consequently, it will help in the rapid diagnosis of subclinical mastitis disease and the reduction of many milk-transmitted diseases to human.
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Department Related Publications
Ahlaam Abd Al Aziz Gharieb Ibrahim, "Association of Plasmid-Mediated Quinolone Resistance with AmpC- Beta-Lactamase Producing E. coli strains from Different Sources", Zagazig Univerisity, 2014
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Iman Ibrahim Attia Sweilem, "The presence of toxin genes of Clostridium perfringens isolated from camels and humans in Egypt. تواجد جينات السموم في المطثية الحاطمة المعزولة من الإبل والآدميين بمصر", كلية الطب البيطرى كرواتيا, 2010
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Iman Ibrahim Attia Sweilem, "Isolation of Staphylococcus aureus from milk and human with reference to its survival on surfaces. عزل المكور العنقودى الذهبى من الحليب والآدميين مع الإشارة لبقائها على الأسطح.", كلية الطب البيطرى - جامعة الزقازيق, 2013
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Lamia Mohammad Reza Mohammad Noman, "Studies on Antibiotic Resistance of Escherichia coli isolated from poultry and children", Sues Canal Vet. Med. J, accepted for publication (2013), 2013
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Lamia Mohammad Reza Mohammad Noman, "Bacteriological studies of Salmonella typhimurium isolated from cow calves and lambs", Assiut Vet. Med. J. Vol. 60 No. 140 January 2014, 2014
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