Background: quality of food hygiene and safety directly affected public health. In Vietnam, after 5 years implementing the programs on ensure food safety, the aspects of food safety had improved significantly; food poisoning had been gradually controlled but still high. Objectives: to access on food poisoning outbreak in first six months of 2006 in Vietnam. Subjectives and Method: a cross sectional and retrospective study on food poisoning outbreak in first six months of 2006. The studied subjectives including: health staffs of provincial preventive centre, staffs in charge of food safety work; documents of food poisoning were stored in VFA. Results: there were 204 outbreaks in 58 provinces with 4.198 victims and 44 deaths or the mortality rate was 1.05%. By causes, percentages of outbreaks, cases and deaths due to bacterial pathogens were 41.7%, 53.4% and 0.0% respectively; due to chemical contamination: 12.7%, 13.0% and 4.5%; due to food denature: 9.3%, 17.2% and 11.4%; and due to natural toxicants: 34.8%, 15.2% and 81.4%, respectively. The number of deaths was highest in North-east and North-west areas (35 cases), in North and South Central coast (5 cases), and in Mekong river data (4 cases). Similarly, the mortality rates in these three regions were 5.0%, 0.49% and 0.27%, respectively. Conclusions: here were 204 outbreaks in 58 provinces with 4.198 victims and 44 deaths. Causes due to bacterial pathogens were the highest, followed by due to natural toxicants. The number of deaths was highest in North-highland.
Foodborne Diseases/epidemiology ;

China ; epidemiology ; Foodborne Diseases ; epidemiology ; Humans ; Population Surveillance

No abstract available.
Disease Outbreaks* ; Epidemiology* ; Foodborne Diseases ; Japan* ; Korea* ; Mortality

OBJECTIVETo compare the field epidemiological investigation and the criminal investigation on a nitrite poisoning event caused by deliberate contamination.

METHODSCases were searched according to the definition of the disease. Information on the histories of onset and diet of all the cases and normal population on site, were investigated face to face. Information as ingredients, processing and sales of foods was also gathered. Samples were collected and nitrite detection were performed. Relevant materials were searched, cases were interviewed and data related to criminal results were collected.

RESULTSPoisoned persons were staff of a big company in Longgang district of Shenzhen. The overall attack rate was 56.25% (63/112), with suspected and confirmed rates as 41.96% and 14.28%, respectively. The fatality rate was 3.17% (2/63). Clinical manifestation and effect of treatment were in accordance with the characteristics of an episode related to acute nitrite food poisoning in terms of factors as the time of onset, involving different age, sex and jobs of the patients. A total of 191 samples, including vomits from patients and seven batches of food and environment samples, were collected, with a positive detected rate of nitrite as 18.84%. Information gathered from the field environment, food distribution and processing supported the assumption that this was an incident of nitrite poisoning event with intention.

RESULTSfrom the criminal investigation showed that the suspect stemmed from the market management rivalry, bought nitrite, dissolved and spread on food stalls F9 and F10.

CONCLUSIONThis event of intentional nitrite release resulting in food contamination which further leading to food poisoning, was completely proved by the joint efforts of the teams and expertise from the field epidemiology survey and the criminal investigation.

Objective: To characterize the prevalence and genomic epidemiology of Vibrio parahaemolyticus from acute diarrheal patients in Shenzhen City from 2013 to 2021. Methods: Based on the Shenzhen Infectious Diarrhea Surveillance System, acute diarrheal patients were actively monitored in sentinel hospitals from 2013 to 2021. Whole-genome sequencing (WGS) of Vibrio parahaemolyticus isolates was performed, and the genomic population structure, serotypes, virulence genes and multilocus sequence typing were analyzed. Outbreak clusters from 2019 to 2021 were explored based on single-nucleotide polymorphism analysis. Results: A total of 48 623 acute diarrhea cases were monitored in 15 sentinel hospitals from 2013 to 2021, and 1 135 Vibrio parahaemolyticus strains were isolated, with a positive isolation rate of 2.3%. Qualified whole-genome sequencing data of 852 isolates were obtained. Eighty-nine serotypes, 21 known ST types and 5 new ST types were identified by sequence analysis, and 93.2% of strains were detected with toxin profile of tdh+trh-. 8 clonal groups (CGs) were captured, with CG3 as the absolute predominance, followed by CG189. The CG3 group was dominated by O3:K6 serotype and ST3 sequence type, while CG189 group was mainly O4:KUT, O4:K8 serotypes and ST189a and ST189 type. A total of 13 clusters were identified, containing 154 cases. About 30 outbreak clusters with 29 outbreak clusters caused by CG3 strains from 2019 to 2021. Conclusion: Vibrio parahaemolyticus is a major pathogen of acute infectious diarrhea in Shenzhen City, with diverse population structures. CG3 and CG189 have been prevalent and predominant in Shenzhen City for a long time. Scattered outbreaks and persistent sources of contamination ignored by traditional methods could be captured by WGS analysis. Tracing the source of epidemic clone groups and taking precise prevention and control measures are expected to significantly reduce the burden of diarrhea diseases caused by Vibrio parahaemolyticus infection in Shenzhen City.
Humans ; Vibrio parahaemolyticus/genetics* ; Diarrhea/epidemiology* ; Foodborne Diseases/epidemiology* ; Serogroup ; Genomics ; Dysentery ; Vibrio Infections/epidemiology* ; Serotyping

Objective: To study the epidemiological and pathogenic characteristics of Vibrio parahaemolyticus isolated from outbreaks cases in Guangdong Province, 2017-2020. Methods: Epidemiological characteristics of 87 outbreak events caused by Vibrio parahaemolyticus were analyzed. Strains were serotyped, and then analyzed by pulsed-field gel electrophoresis (PFGE). Results: The food-borne disease outbreak caused by Vibrio parahaemolyticus was found in 16 cities. 44.8% (39/87) and 37.9% (33/87) of the outbreaks occurred in hotels, restaurants and school canteens, respectively. Improper food processing and storage (40.2%, 35/87) and cross contamination caused by indiscriminate raw and cooked food (25.3%, 22/87) were the main causes of food-borne disease outbreaks of Vibrio parahaemolyticus. The main serotypes of patient derived strains were O3:K6 (87.5%) and O4:KUT (22.5%). The similarity value between O3:K6 type isolates was 65.5%-100.0%, and the PFGE pattern similarity value of O4:KUT type isolates was 66.5%-100.0%. Conclusion: Outbreaks caused by Vibrio parahaemolyticus are widely distributed in Guangdong province. It is necessary to strengthen the publicity and education on the correct handling of food in hotels, restaurants, schools, and unit canteens. O3:K6 and O4:KUT serotypes are the main serotypes of the outbreak. There is genetic diversity among the epidemic strains.
China/epidemiology* ; Disease Outbreaks ; Foodborne Diseases/epidemiology* ; Humans ; Serotyping ; Vibrio Infections/epidemiology* ; Vibrio parahaemolyticus/genetics*

OBJECTIVE: To determine the application of autoregressive integrated moving average (ARIMA) model in food poisoning prediction in Hunan Province, and to provide scientific basis for the prevention and control of food poisoning. METHODS: We collected the number of food poisoning from January 2003 to December 2009 in Hunan Province for ARIMA model fitting, and used food poisoning data of 2010 to verify the effect of model prediction. We predicted the number of food poisoning in 2011. RESULTS: ARIMA (0,1,1) (0,1,1)12 better fit the trends of the poisoning number in previous time periods and series, with prediction fitting error of 9.59%. The number of food poisoning in Hunan Province in 2011 was predicted to be 834. CONCLUSION ARIMA model can better fit the number of food poisoning in the short term trends and series. If used for long-term forecasts.
China ; epidemiology ; Foodborne Diseases ; epidemiology ; prevention & control ; Forecasting ; Humans ; Incidence ; Models, Statistical

Adult ; China ; epidemiology ; Female ; Foodborne Diseases ; epidemiology ; Humans ; Male ; Sentinel Surveillance ; Young Adult

PURPOSE: The purpose of this study was to investigate the relationship between acute diarrheal disease and causative seafood. METHODS: This study was done retrospectively by investigating age, sex, symptoms, and causative seafoods in 140 patients. Correlating symptoms were vomiting, abdominal pain, fever, and bloody diarrhea. Causative seafood were crab, spiny lobster, pickles, sliced raw fish, and shellfish. All patients was seen at our hospital between September and November in two consecutive years, 2000 and 2001. RESULTS: An characteristic of seafood related food poisoning was an age of 30 or older. The major cause of seafood related food poisoning was crab. The most common symptom of seafood related food poisoning was abdominal pain. Symptom of crab relate food poisoning was most severe. CONCLUSION: Further studies are recommended to document an epidemiology and bacteriologic analysis of seafood related food poisoning in Chungnam-Taeangun.
Abdominal Pain ; Diarrhea ; Epidemiology ; Fever ; Foodborne Diseases ; Humans ; Korea* ; Palinuridae ; Retrospective Studies ; Seafood* ; Shellfish ; Vomiting

Objectives: To analyze the causes of a foodborne outbreak in rural areas of Xinjiang between April 2 and April 5 in 2016. Methods: Cases and the relevant background information were obtained by consulting outpatient records of local health centers and regional people's hospitals and interviewing doctors and residents. All samples were collected by the laboratory test through epidemiological and food hygiene investigations. The χ² test (Fisher's exact probability method) was used to compare differences in incidence rates. Molecular typing, virulence genes and single nucleotide polymorphisms (SNPS) were analyzed by using Pulsed Field Gel Electrophoresis (PFGE) and Whole Genome Sequencing (WGS). Results: A total of 142 cases were found in this study, with incidence rate at 5.7‰ (142/24 979). Among all cases, the main symptoms were nausea (94%), vomiting (92%) and abdominal pain (67%), and the incubation period was about 2 h (1-7.5 h). There were 16 Staphylococcus aureus isolates identified and all of them could produce A+C+E mixed enterotoxin. PFGE showed 100% homology. WGS further revealed that there were 9 and 1 strains contained by Sequence Type 1 (ST1) and ST5405, respectively. All ST1 strains were in the same clade on the genome tree. Among these, 7 strains shared close proximity (74 SNPs) and 2 strains shared close relationships as well (127 SNPs). The S. aureus isolates that caused the outbreak were introduced by a mutant isolate from the milk supply station. Conclusions: This foodborne outbreak was mainly caused by Staphylococcus aureus contamination.
Disease Outbreaks ; Electrophoresis, Gel, Pulsed-Field ; Foodborne Diseases/epidemiology* ; Humans ; Staphylococcus aureus/genetics*