1
|
Li M, Wang Y, Hou B, Chen Y, Hu M, Zhao X, Zhang Q, Li L, Luo Y, Liu Y, Cai Y. Toxin gene detection and antibiotic resistance of Clostridium perfringens from aquatic sources. Int J Food Microbiol 2024; 415:110642. [PMID: 38428166 DOI: 10.1016/j.ijfoodmicro.2024.110642] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 02/09/2024] [Accepted: 02/23/2024] [Indexed: 03/03/2024]
Abstract
Clostridium perfringens is a zoonotic opportunistic pathogen that produces toxins that can cause necrotic enteritis and even "sudden death disease". This bacterium is widely distributed in the intestines of livestock and human, but there are few reports of distribution in aquatic animals (Hafeez et al., 2022). In order to explore the isolation rate of C. perfringens and the toxin genes they carry, 141 aquatic samples, including clams (Ruditapes philippinarum), oysters (Ostreidae), and mud snails (Bullacta exerata Philippi), were collected from the coastal areas of Shandong Province, China. C. perfringens strains were tested for cpa, cpb, etx, iap, cpb2, cpe, netB, and tpeL genes. 45 clam samples were boiled at 100 °C for 5 min before bacteria isolation. 80 strains were isolated from 141 samples with the positive rate being 57 %.And the positive rates of cooked clams was 87 % which was higher than the average. In detection of 8 toxin genes, all strains tested cpa positive, 3 strains netB positive, and 2 cpb and cpe, respectively. 64 strains were selected to analyze the antibiotic resistance phenotype of 10 antibiotics. The average antibiotic resistance rates of the strains to tetracycline, clindamycin, and ampicillin were 45 %, 20 %, and 16 % respectively, and the MIC of 4 strains to clindamycin was ≥128 μg/mL. A high isolation rate of C. perfringens from aquatic animals was shown, and it was isolated from boiled clams for the first time, in which cpe and netB toxin genes were detected for the first time too. The toxin encoded by cpe gene can cause food poisoning of human, thus the discoveries of this study have certain guiding significance for food safety. Antibiotics resistant C. perfringens of aquatic origin may arise from transmission in the terrestrial environment or from antibiotic contamination of the aquaculture environment and is of public health significance.
Collapse
Affiliation(s)
- Mengxuan Li
- College of Veterinary Medicine, Shandong Agricultural University, Taian, China
| | - Ying Wang
- College of Veterinary Medicine, Shandong Agricultural University, Taian, China
| | - Bingyu Hou
- College of Veterinary Medicine, Shandong Agricultural University, Taian, China
| | - Yibao Chen
- Shandong Academy of Agricultural Sciences, Jinan, China
| | - Ming Hu
- Shandong Academy of Agricultural Sciences, Jinan, China
| | - Xiaonan Zhao
- Shandong Academy of Agricultural Sciences, Jinan, China
| | - Qing Zhang
- Shandong Academy of Agricultural Sciences, Jinan, China
| | - Lulu Li
- Shandong Academy of Agricultural Sciences, Jinan, China
| | - Yanbo Luo
- Shandong Academy of Agricultural Sciences, Jinan, China
| | - Yuqing Liu
- Shandong Academy of Agricultural Sciences, Jinan, China.
| | - Yumei Cai
- College of Veterinary Medicine, Shandong Agricultural University, Taian, China.
| |
Collapse
|
2
|
Peng K, Chen M, Wang Y, Tian Z, Deng L, Li T, Feng Y, Ouyang P, Huang X, Chen D, Geng Y. Genotype diversity and antibiotic resistance risk in Aeromonas hydrophila in Sichuan, China. Braz J Microbiol 2024; 55:901-910. [PMID: 37999911 PMCID: PMC10920602 DOI: 10.1007/s42770-023-01187-9] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 10/31/2023] [Indexed: 11/25/2023] Open
Abstract
Sichuan is a significant aquaculture province in China, with a total aquaculture output of 1.72 × 106 tons in 2022. One of the most significant microorganisms hurting the Sichuan aquaculture is Aeromonas hydrophila, whose genotype and antibiotic resistance are yet unknown. This study isolated a total of 64 strains of A. hydrophila from various regions during September 2019 to June 2021 within Sichuan province, China. The technique of Multi-Locus Sequence Typing (MLST) was used for the purpose of molecular typing. Meanwhile, identification of antibiotic resistance phenotype and antibiotic resistance gene was performed. The findings of the study revealed that 64 isolates exhibited 29 sequence types (ST) throughout different regions in Sichuan, with 25 of these ST types being newly identified. Notably, the ST251 emerged as the predominant sequence type responsible for the pandemic. The resistance rate of isolated strains to roxithromycin was as high as 98.3%, followed by co-trimoxazole (87.5%), sulfafurazole (87.5%), imipenem (80%), amoxicillin (60%), and clindamycin (57.8%). Fifteen strains of A. hydrophila exhibited resistance to medicines across a minimum of three categories, suggesting the development of multidrug resistance in these isolates. A total of 63 ARGs were detected from the isolates, which mediated a range of antibiotic resistance mechanisms, with deactivation and efflux potentially serving as the primary mechanisms of antibiotic resistance. This study revealed the diversity of A. hydrophila genotypes and the risk of antibiotic resistance in Sichuan, providing reference for scientific and effective control of A. hydrophila infection.
Collapse
Affiliation(s)
- Kun Peng
- College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road No. 211, Chengdu, 611130, Sichuan, China
| | - Mengzhu Chen
- College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road No. 211, Chengdu, 611130, Sichuan, China
- Chengdu Animal Disease Prevention and Control Center, Chengdu, 60041, Sichuan, China
| | - Yilin Wang
- College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road No. 211, Chengdu, 611130, Sichuan, China
| | - Ziqi Tian
- College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road No. 211, Chengdu, 611130, Sichuan, China
| | - Longjun Deng
- Yalong River Hydropower Development Company Ltd, Chengdu, Sichuan, China
| | - Tiancai Li
- Yalong River Hydropower Development Company Ltd, Chengdu, Sichuan, China
| | - Yang Feng
- College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road No. 211, Chengdu, 611130, Sichuan, China
| | - Ping Ouyang
- College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road No. 211, Chengdu, 611130, Sichuan, China
| | - Xiaoli Huang
- Department of Aquaculture, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Defang Chen
- Department of Aquaculture, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Yi Geng
- College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road No. 211, Chengdu, 611130, Sichuan, China.
| |
Collapse
|