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Prevalence and molecular characteristics of Listeria monocytogenes in cooked products and its comparison with isolates from listeriosis cases

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Frontiers of Medicine 2018年第1期12卷 104-112页

作者： Hong Wang Lijuan Luo Zhengdong Zhang Jianping Deng Yan Wang Yimao Miao Ling Zhang Xi Chen Xiang Liu Songsong Sun Bo Xiao Qun Li Changyun Ye Zigong Center for Disease Control and Prevention Zigong 643000 China State Key Laboratory of Infectious Disease Prevention and Control National Institute for Communicable Disease Control and Prevention Collaborative Innovation Center for Diagnosis and Treatment of lnfectious Diseases Chinese Center for Disease Control and Prevention Beijing 102206 China

This study aimed to investigate the prevalence and molecular characteristics ofListeria monocytogenes in cooked products in Zigong City, China. The overall occurrence of the L. monocytogenes in the ready-to-eat （RTE） shops and mutton restaurants surveyed was 16.2% （141/873）. An occurrence of 13.5% was observed in RTE pork, 6.5% in RTE vegetables, and more than 24.0% in either cooked mutton or cooked haggis. Serotype 1/2b （45.4%）, 1/2a （33.3%）, and 1/2c （14.2%） were the predominant types. By comparing the clonal complexes （CCs） based on multilocus sequence typing （MLST） of the L. monocytogenes from cooked foods in Zigong City and 33 listeriosis cases from different districts of China, CC87, CC9, CC8, and CC3 were showed to be prevalent in cooked products and CC87 and CC3 were the first two frequent types in the 33 clinic-source strains. All CC87 stains harbored the newly reported Listeria pathogenicity island 4 （LIPI-4） gene fragment ptsA, and all CC3 strains possessed the Listeria pathogenicity island 3 （LIPI-3） gene fragment llsX. These may increase the occurrence of the strains belonging to CC87 and CC3 in listeriosis cases in China and also underline the risk of infection owing to the consumption of the cooked products from Zigong. ST619 （serotype 1/2b） harbored both llsX and ptsA, indicating a potential hypervirulent sequence type in Zigong.

关键词： Listeria monocytogenes MLST LIPI-3 LIPI-4 RTE listeriosis

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listeriosis Knowledge and Attitude among Pregnant Women Attending a Tertiary Health Institution, South Western Nigeria

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Advances in Infectious Diseases 2020年第2期10卷 64-75页

作者： Emelda E. Chukwu Francisca O. Nwaokorie Center for Infectious Disease Research Microbiology Department of the Nigerian Institute of Medical Research Yaba Nigeria Department of Medical Laboratory Sciences College of Medicine University of Lagos Lagos Nigeria

Background: listeriosis affects immunosuppressed individual’s especially pregnant women. Maternal infections are usually mild for the woman, but may have devastating effects on the unborn child, including miscarriage, stillbirth, preterm labour and serious neonatal illness. WHO recommends that pregnant women should be educated to avoid foods with high risk of contamination. This study seeks to evaluate knowledge and practices predisposing to listeria infections during pregnancy. Methodology: This is a cross-sectional study on pregnant women, attending the antenatal clinic of Lagos University Teaching Hospital (LUTH) using semi structured questionnaires. The knowledge score of participants was collated and analyzed using SPSS version 26. Results: The mean age of the participants was 32.07 ± 5.6 years. Forty-three (30.7%) women have had previous miscarriages with the mean no of miscarriage of 1.54. Out of 147 participants, only 20 (13.6%) admitted having heard of listeriosis while 127 (86.4%) had never heard of listeriosis and none of the participants has ever been tested for listeriosis. The Overall knowledge score was poor, and this was irrespective of age and duration of pregnancy. However, women with graduate and/or postgraduate degrees were more likely to have heard of listeriosis (X2 = 10.88, P = 0.028). Conclusion: Our study shows a low level of knowledge about this food-borne illness, which can lead to severe illnesses in pregnant women and their unborn child. It is necessarily to educate pregnant women on the risk of listeriosis. This would be a key factor in creating and implementing accurate measures of prevention and control.

关键词： listeriosis Listeria monocytogenes Pregnant Women Fetal Death Nigeria

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Systematic review of Listeria monocytogenes from food and clinical samples in Chinese mainland from 2010 to 2019

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Food Quality and Safety 2022年第3期6卷 365-374页

作者： Ying Cheng Qingli Dong Yangtai Liu Hong Liu Hongzhi Zhang Xiang Wang School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghaiChina Shanghai Municipal CenterforDisease Control and Prevention ShanghaiChina

Listeria monocytogenes(***),a foodborne pathogen,can cause human *** is a potentially fatal gastrointestinal illness,which is closely related to the spread of food to *** review the literature published during 2010-2019 to better understand the prevalence of *** in food products,incidence of human listeriosis,and their characteristics in Chinese *** found the main sequence types(STs)strains from foods are similar globally,and the prevalence of *** from raw meat was the highest among all food *** most common STs in food products and clinical cases were ST9(serogroup I.2)strains and ST87(serogroup Il.2)strains,*** ST87 strains being the most common STs of clinical cases might be related to the existence of Listeria pathogenicity island 4 gene and Chinese eating habits for ready-to-eat foods,among which the prevalence of ST87 strain was the highest in ready-to-eat ***,more research should be conducted to explore the reasons for the *** isolates differences in food and clinical sources.

关键词： listeriosis foodborne pathogens subtype epidemiology food safety

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Occurrence of Multi-Drug Resistant <i>Listeria species</i>in Faecal Samples of Poultry Chickens in Rural Farms in Lagos State, Nigeria

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Advances in Infectious Diseases 2021年第1期11卷 49-59页

作者： Emelda E. Chukwu Veronica N. Ibeh Olabisi F. Davies-Bolorunduro Center for Infectious Diseases’ Research Microbiology Department Nigerian Institute of Medical Research Yaba Lagos State Nigeria National Agency for Food and Drug Administration and Control Lagos State Nigeria Center for Tuberculosis Research Microbiology Department Nigerian Institute of Medical Research Yaba Lagos State Nigeria

Background: listeriosis is a common zoonotic disease caused by a foodborne pathogen, Listeria monocytogenes. Poultry meat and products have been established as vehicles of transmission of pathogenic Listeria strains to humans. This study evaluates the occurrence of Listeria species in faeces of poultry chicken in Lagos. Methods: One hundred and fourteen pooled fresh faecal samples from cage-reared broiler chickens were collected from 12 farms in three rural areas in Lagos State from May to August 2019. All samples were analysed for Listeria species detection according to ISO11290-1 standard and confirmed using PCR assay. Susceptibility testing was performed using the Kirby-Bauer disc diffusion technique. Results: Twenty-eight (24.6%) Listeria species were detected from 114 faecal samples. The isolated Listeria species were L. monocytogenes 8 (7.0%), L. ivanovii 9 (7.9%), L. grayi 7 (6.1%) and L. innocua 4 (3.5%). There was no significant difference in the frequency of occurrence of Listeria species across the different locations (X2 = 4.98, p = 0.08). The listeria species were susceptible to Augmentin (96.4%), vancomycin (85.7%) and co-trimoxazole (82.1%), but resistant to ceftazidime (100%), tetracycline (75.0%) and ciprofloxacin (71.4%). Conclusion: This study reveals high occurrence of multi-drug resistant Listeria species in faecal samples of poultry chickens in Lagos state which may be an important vector in the contamination of the environment and transmission of antibiotic resistant Listeria species to consumers.

关键词： listeriosis Listeria monocytogenes Multi-Drug Resistance Poultry Farms Zoonotic Disease Chickens

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