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Hazarika R, Sarmah H, Doley MK, Saikia DP, Hazarika G, Barkalita LM, Deka P, Manoharan S, Sharma RK. Clostridioides difficile in food and food products of animal origin in Assam, India. Anaerobe 2023; 81:102723. [PMID: 37023847 DOI: 10.1016/j.anaerobe.2023.102723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 01/09/2023] [Accepted: 03/27/2023] [Indexed: 04/08/2023]
Abstract
OBJECTIVE Considering the paucity of information about food-associated Clostridioides difficile from India, a study was undertaken to establish the prevalence of C. difficile in a variety of foods of animal origin, together with molecular strain characterization and antimicrobial resistance. METHODS A total of 235 samples comprising raw meat and meat products, fish products, and milk and milk products were screened for C. difficile. Toxin genes and other parts of PaLoc were amplified in isolated strains. The resistance pattern towards commonly used antimicrobial agents was studied by the Epsilometric test. RESULTS C. difficile was isolated from 17(7.23%) different food samples of animal origin, including toxigenic (6) and non-toxigenic (11) isolates. In four toxigenic strains, the tcdA gene could not be detected under used conditions (tcdA-tcdB+). However, all strains had binary toxin-associated genes (cdtA and cdtB). The antimicrobial resistance was highest in non-toxigenic C. difficile isolates in food of animal origin. CONCLUSION Meat, meat products and dry fish, but not milk and milk products were contaminated with C. difficile. Contamination rates were low with diverse toxin profiles and antibiotic resistance patterns among the C. difficile strains.
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Affiliation(s)
- Ritam Hazarika
- Department of Animal Biotechnology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, Assam, India
| | - Hiramoni Sarmah
- Department of Microbiology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, Assam, India
| | - Monuj K Doley
- KVK, Assam Agricultural University, Karbi Anglong, Assam, India
| | - Deep Prakash Saikia
- Department of Animal Biotechnology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, Assam, India
| | - Girin Hazarika
- Department of Animal Biotechnology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, Assam, India
| | - Luit Moni Barkalita
- Department of Animal Biotechnology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, Assam, India
| | - Pankaj Deka
- Department of Microbiology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, Assam, India
| | - Seeralan Manoharan
- Centre for Animal Health Studies, Tamil Nadu Veterinary and Animal Sciences University, Chennai, 600051, India
| | - Rajeev Kr Sharma
- Department of Microbiology, College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 781022, Assam, India.
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Sarmah H, Hazarika R, Tamuly S, Deka P, Manoharan S, Sharma RK. Evaluation of different antigenic preparations against necrotic enteritis in broiler birds using a novel Clostridium perfringens type G strain. Anaerobe 2021; 70:102377. [PMID: 33957249 DOI: 10.1016/j.anaerobe.2021.102377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 04/09/2021] [Accepted: 04/17/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Keeping in view, the constraints faced by the Indian broiler industry with lack of a suitable vaccine against Necrotic Enteritis (NE), a study has been proposed to explore the prevalence and detail characterization of C. perfringens type G in NE suspected broiler chicken in the process of suitable vaccine development. METHODS Intestinal scrapings/faecal contents of NE suspected broiler chickens were screened to establish the prevalence of C.perfringens type G in broiler birds. A most pathogenic, highly resistant type G isolate of C. perfringens, bearing both tpeL and gapC gene was selected for preparation of three different vaccine formulations, and to evaluate their immunogenic potential in broiler birds. RESULTS Screening of clinical samples of NE suspected broiler birds revealed C. perfringens type G, bearing gapC gene in 51.22% samples, of which 47.62% revealed tpeL gene. Seven of the tpeLpos type G isolates were comparatively more pathogenic for mice, of which, one exhibited multidrug resistance towards ciprofloxacin, norfloxacin, tetracycline and levofloxacin. The sonicated supernatant (SS) prepared from the selected tpeL and gapC positive isolate could maintain a significantly higher protective IgG response than toxoid and bacterin preparation from the 21st to 28thday of age in immunized birds. CONCLUSION The additional TpeL toxin in C. perfringens type G has been proved to be an additional key biological factor in the pathogenesis of NE in broiler chickens. Considering the release of more immunogenic proteins, the SS proved to be a better immunogenic preparation against NE with a multiple immunization dose.
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Affiliation(s)
- Hiramoni Sarmah
- Department of Microbiology, College of Veterinary Science, AAU., Khanapara, Guwahati, Assam, India
| | - Ritam Hazarika
- Department of Microbiology, College of Veterinary Science, AAU., Khanapara, Guwahati, Assam, India
| | - Shantonu Tamuly
- Department of Animal Biochemistry, College of Veterinary Science, AAU., Khanapara, Guwahati, Assam, India
| | - Pankaj Deka
- Department of Microbiology, College of Veterinary Science, AAU., Khanapara, Guwahati, Assam, India
| | - Seeralan Manoharan
- Vaccine Research Centre-Bacterial Vaccines, Centre for Animal Health Studies, TANUVAS, Chennai, India
| | - Rajeev K Sharma
- Department of Microbiology, College of Veterinary Science, AAU., Khanapara, Guwahati, Assam, India.
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Sarmah H, Shah M, Pathak M, Barman NN, Koul M, Gupta A, Sahariah PJ, Neher S, Das SK, Gogoi SM, Kumar S. Pathodynamics of Circulating Strains of Duck Enteritis Virus: A Step Forward to Understand Its Pathogenesis. Avian Dis 2020; 64:166-173. [PMID: 32550617 DOI: 10.1637/0005-2086-64.2.166] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 01/22/2020] [Indexed: 11/05/2022]
Abstract
Duck enteritis virus (DEV) causes an acute and contagious infection in duck. The present study was carried out to evaluate the pathogenicity and pathodynamics of DEV isolates from different natural outbreaks in the Assam Province of India. A total of six wild-type isolates of DEV were revived in ducklings to determine its biologic characterization. Postmortem examination of infected ducklings revealed DEV-specific gross lesions in different organs. The presence of DEV was confirmed by its genome amplification and the presence of viral antigens from collected tissue samples by indirect fluorescent antibody test. All the isolates revived in ducklings were further propagated in duck embryo fibroblast cells. Highly virulent and low virulent isolates of DEV were selected for further study based on median duck infectivity dose (DID50) and median tissue culture infectivity dose (TCID50). The highly virulent isolate of DEV had values of 102 DID50/ml and 106.33 TCID50/ml, whereas the low virulent strain had titers of 10 DID50/ml and 104.83 TCID50/ml in the cell culture. Our results showed replication of DEV in ducks with the highest and lowest viral titers in the thymus and bursa of Fabricius, respectively. In addition, microscopic analysis revealed necrosis and degeneration of submucosal esophageal glands and glandular epithelium. The study will be useful to understand the organ tropism and pathologic alteration among the virulent DEV isolates.
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Affiliation(s)
- Hiramoni Sarmah
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Manisha Shah
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039
| | - Mamta Pathak
- Department of Pathology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Nagendra N Barman
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Monika Koul
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039
| | - Anjali Gupta
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039
| | - Parag Jyoti Sahariah
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039
| | - Samsun Neher
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - S K Das
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Sophia M Gogoi
- Department of Microbiology, College of Veterinary Sciences, Assam Agricultural University, Khanapara, Guwahati, Assam, India 781022
| | - Sachin Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India 781039,
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