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Outbreak food epidemiology

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https://www.readbyqxmd.com/read/29201151/complete-genome-sequences-of-clostridium-perfringens-del1-strain-isolated-from-chickens-affected-by-necrotic-enteritis
#1
Charles Li, Xianghe Yan, Hyun S Lillehoj
Background: Clostridium perfringens is ubiquitous in nature. It is a normal inhabitant in the intestinal tract of animals and humans. As the primary etiological agent of gas gangrene, necrosis and bacteremia, C. perfringens causes food poisoning, necrotic enteritis (NE), and even death. Epidemiology research has indicated that the increasing incidence of NE in poultry is associated with the withdrawal of in-feed antibiotic growth promoters in poultry production in response to government regulations...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/29165706/cholera-epidemics-of-the-past-offer-new-insights-into-an-old-enemy
#2
Matthew Phelps, Mads Linnet Perner, Virginia E Pitzer, Viggo Andreasen, Peter K M Jensen, Lone Simonsen
Background: Although cholera is considered the quintessential long-cycle waterborne disease, studies have emphasized the existence of short-cycle (food, household) transmission. We investigated singular Danish cholera epidemics (1853) to elucidate epidemiological parameters and modes of spread. Methods: Using time series data from cities with different water systems, we estimated the intrinsic transmissibility (R0). Accessing cause-specific mortality data we studied clinical severity, age-specific impact...
November 20, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29162354/-cryptosporidiosis-a-cause-of-acute-diarrhea-a-review-and-retrospective-study-of-cases-in-rouen-university-hospital-s-pediatrics-department
#3
G Gargala, R Razakandrainibe, D Costa, D Leméteil, C Dumant Forest
Cryptosporidium is the most important diarrhea-causing protozoan parasite, with severe health consequences for very young, malnourished children living in endemic areas and for immunocompromised individuals. Cryptosporidium is widely distributed and disease transmission can occur through person-to-person or animal-to-person contact, or contaminated food or water (drinking or swimming), leading to large outbreaks. The zoonotic Cryptosporidium parvum and the anthroponotic Cryptosporidium hominis are responsible for the majority of human cases...
November 18, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29137606/outbreak-of-caliciviruses-in-the-singapore-military-2015
#4
Freddy Jun Xian Neo, Jimmy Jin Phang Loh, Peijun Ting, Wei Xin Yeo, Christine Qiu Han Gao, Vernon Jian Ming Lee, Boon Huan Tan, Ching Ging Ng
BACKGROUND: From 31 August to 9 September 2015, a total of 150 military personnel at a military institution in Singapore were infected with acute gastroenteritis (AGE) with an attack rate of approximately 3%. This study aimed to determine the epidemiology of the outbreak, investigate its origins, and discuss measures to prevent future occurrences. METHODS: After the AGE outbreak was declared on 31 August 2015, symptom surveys, hygiene inspections, and the testing of water, food, and stool samples were initiated...
November 14, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29122606/foodborne-cryptosporidiosis
#5
REVIEW
Una Ryan, Nawal Hijjawi, Lihua Xiao
Foodborne illness, the majority of which is caused by enteric infectious agents, costs global economies billions of dollars each year. The protozoan parasite Cryptosporidium is particularly suited to foodborne transmission and is responsible for >8 million cases of foodborne illness annually. Procedures have been developed for sensitive detection of Cryptosporidium oocysts on fresh produce and molecular diagnostic assays have been widely used in case linkages and infection source tracking, especially during outbreak investigations...
November 7, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/29104564/high-throughput-sequencing-for-detection-of-foodborne-pathogens
#6
REVIEW
Camilla Sekse, Arne Holst-Jensen, Ulrich Dobrindt, Gro S Johannessen, Weihua Li, Bjørn Spilsberg, Jianxin Shi
High-throughput sequencing (HTS) is becoming the state-of-the-art technology for typing of microbial isolates, especially in clinical samples. Yet, its application is still in its infancy for monitoring and outbreak investigations of foods. Here we review the published literature, covering not only bacterial but also viral and Eukaryote food pathogens, to assess the status and potential of HTS implementation to inform stakeholders, improve food safety and reduce outbreak impacts. The developments in sequencing technology and bioinformatics have outpaced the capacity to analyze and interpret the sequence data...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29102506/-consumption-of-psychoactive-drugs-and-exposure-to-bacterial-toxins-carried-by-food-a-dangerous-association
#7
Anaïs Corma-Gómez, Rocío López-Sepúlveda, Inés Capitán-Del Río, María Dolores Sánchez Mariscal, Begoña López-Hernández
OBJECTIVE: To describe and analyse from a clinical and epidemiological point of view, a food borne outbreak in a psychiatric institution in Granada, in 2015, and to examine whether treatment with psychoactive drugs constitutes a risk factor for the development of a food borne disease, analysing the degree of susceptibility according to the therapeutic group consumed. METHOD: Ambispective cohort study. Residents were the unit of analysis. Our group carried out an active case search and a food survey...
November 1, 2017: Gaceta Sanitaria
https://www.readbyqxmd.com/read/29054297/hemolytic-uremic-syndrome-due-to-shiga-toxin-producing-escherichia-coli-infection
#8
REVIEW
M Bruyand, P Mariani-Kurkdjian, M Gouali, H de Valk, L A King, S Le Hello, S Bonacorsi, C Loirat
The leading cause of hemolytic uremic syndrome (HUS) in children is Shiga toxin-producing Escherichia coli (STEC) infection, which has a major outbreak potential. Since the early 2010s, STEC epidemiology is characterized by a decline of the historically predominant O157 serogroup and the emergence of non-O157 STEC, especially O26 and O80 in France. STEC contamination occurs through the ingestion of contaminated food or water, person-to-person transmission, or contact with ruminants or their contaminated environment...
October 17, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/29020965/epidemiological-link-of-a-major-cholera-outbreak-in-greater-accra-region-of-ghana-2014
#9
Kennedy Ohene-Adjei, Ernest Kenu, Delia Akosua Bandoh, Prince Nii Ossah Addo, Charles Lwanga Noora, Priscillia Nortey, Edwin Andrew Afari
BACKGROUND: Cholera remains an important public health challenge globally. Several pandemics have occurred in different parts of the world and have been epidemiologically linked by different researchers to illustrate how the cases were spread and how they were related to index cases. Even though the risk factors associated with the 2014 cholera outbreak were investigated extensively, the link between index cases and the source of infection was not investigated to help break the transmission process...
October 11, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28994868/foodborne-outbreak-simulation-to-teach-field-epidemiology-the-moroccan-field-epidemiology-training-program
#10
Imane Jroundi, Abdellatif Belarbi
BACKGROUND: Morocco in 2010 launched a new field epidemiology training program to enhance the skills of health professionals in charge of epidemiological surveillance and to investigate outbreaks; including foodborne diseases that represent a very substantial burden of disease. AIM: To apply an active learning method to teach outbreak investigation within a controled environment for field epidemiology trainees program at the Moroccan National school of public Health...
November 2016: La Tunisie Médicale
https://www.readbyqxmd.com/read/28984428/fasciola-and-fasciolosis-in-ruminants-in-europe-identifying-research-needs
#11
N J Beesley, C Caminade, J Charlier, R J Flynn, J E Hodgkinson, A Martinez-Moreno, M Martinez-Valladeres, J Perez, L Rinaldi, D J L Williams
Fasciola hepatica is a trematode parasite with a global distribution, which is responsible for considerable disease and production losses in a range of food producing species. It is also identified by WHO as a re-emerging neglected tropical disease associated with endemic and epidemic outbreaks of disease in human populations. In Europe, F. hepatica is mostly associated with disease in sheep, cattle and goats. This study reviews the most recent advances in our understanding of the transmission, diagnosis, epidemiology and the economic impact of fasciolosis...
October 6, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28970227/wide-but-variable-distribution-of-a-hypervirulent-campylobacter-jejuni-clone-in-beef-and-dairy-cattle-in-the-united-states
#12
Yizhi Tang, Richard J Meinersmann, Orhan Sahin, Zuowei Wu, Lei Dai, James Carlson, Jodie Plumblee, Linda Genzlinger, Jeffrey T LeJeune, Qijing Zhang
Campylobacter jejuni clone SA is the major cause of sheep abortion and contributes significantly to foodborne illnesses in the United States. Clone SA is hypervirulent because of its distinct ability to produce systemic infection and its predominant role in clinical sheep abortion. Despite the importance of clone SA, little is known about its distribution and epidemiological features in cattle. Here, we describe a prospective study on C. jejuni clone SA prevalence in 35 feedlots in 5 different states in the U...
September 29, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28955706/a-comprehensive-evaluation-of-the-genetic-relatedness-of-listeria-monocytogenes-serotype-4b-variant-strains
#13
Laurel S Burall, Christopher J Grim, Mark K Mammel, Atin R Datta
Recently, we have identified a link between four listeriosis incidents/outbreaks to a variant of Listeria monocytogenes (Lm) serotype 4b strains, 4bV. Although 4bV strains have been reported from clinical specimens as well as from foods, listeriosis outbreaks occurring in 2014-2016 were the first reported outbreaks involving 4bV in the USA. Since traditional typing methods do not detect members of this group, we undertook a systematic and retrospective analysis of all Lm in the NCBI WGS Sequence Read Archive database to investigate the burden of 4bV strains among all listeriosis cases...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28947769/quantifying-airborne-dispersal-routes-of-pathogens-over-continents-to-safeguard-global-wheat-supply
#14
M Meyer, J A Cox, M D T Hitchings, L Burgin, M C Hort, D P Hodson, C A Gilligan
Infectious crop diseases spreading over large agricultural areas pose a threat to food security. Aggressive strains of the obligate pathogenic fungus Puccinia graminis f.sp. tritici (Pgt), causing the crop disease wheat stem rust, have been detected in East Africa and the Middle East, where they lead to substantial economic losses and threaten livelihoods of farmers. The majority of commercially grown wheat cultivars worldwide are susceptible to these emerging strains, which pose a risk to global wheat production, because the fungal spores transmitting the disease can be wind-dispersed over regions and even continents (1-11) ...
September 25, 2017: Nature Plants
https://www.readbyqxmd.com/read/28941902/national-survey-of-foodborne-viruses-in-australian-oysters-at-production
#15
Valeria Torok, Kate Hodgson, Catherine McLeod, Jessica Tan, Navreet Malhi, Alison Turnbull
Internationally human enteric viruses, such as norovirus (NoV) and hepatitis A virus (HAV), are frequently associated with shellfish related foodborne disease outbreaks, and it has been suggested that acceptable NoV limits based on end-point testing be established for this high risk food group. Currently, shellfish safety is generally managed through the use of indicators of faecal contamination. Between July 2014 and August 2015, a national prevalence survey for NoV and HAV was done in Australian oysters suitable for harvest...
February 2018: Food Microbiology
https://www.readbyqxmd.com/read/28930002/investigation-of-outbreaks-of-salmonella-enterica-serovar-typhimurium-and-its-monophasic-variants-using-whole-genome-sequencing-denmark
#16
Pernille Gymoese, Gitte Sørensen, Eva Litrup, John Elmerdal Olsen, Eva Møller Nielsen, Mia Torpdahl
Whole-genome sequencing is rapidly replacing current molecular typing methods for surveillance purposes. Our study evaluates core-genome single-nucleotide polymorphism analysis for outbreak detection and linking of sources of Salmonella enterica serovar Typhimurium and its monophasic variants during a 7-month surveillance period in Denmark. We reanalyzed and defined 8 previously characterized outbreaks from the phylogenetic relatedness of the isolates, epidemiologic data, and food traceback investigations. All outbreaks were identified, and we were able to exclude unrelated and include additional related human cases...
October 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28925349/real-time-genomic-investigation-underlying-the-public-health-response-to-a-shiga-toxin-producing-escherichia-coli-o26-h11-outbreak-in-a-nursery
#17
J Moran-Gilad, A Rokney, D Danino, M Ferdous, F Alsana, M Baum, L Dukhan, V Agmon, E Anuka, L Valinsky, R Yishay, I Grotto, J W A Rossen, M Gdalevich
Shiga toxin-producing Escherichia coli (STEC) is a significant cause of gastrointestinal infection and the haemolytic-uremic syndrome (HUS). STEC outbreaks are commonly associated with food but animal contact is increasingly being implicated in its transmission. We report an outbreak of STEC affecting young infants at a nursery in a rural community (three HUS cases, one definite case, one probable case, three possible cases and five carriers, based on the combination of clinical, epidemiological and laboratory data) identified using culture-based and molecular techniques...
October 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28910926/-survey-on-a-public-health-emergency-event-caused-by-norovirus
#18
Y Xing, C Jiang, W Y Hua, F Liu, Z Zhao, Y J Ding, L Wang, J Li
Objective: To study the epidemiological characteristics of an outbreak caused by norovirus infection in a school in Haidian district, Beijing. Methods: Basic information of the school and data related to patients in the fields survey were collected and analyzed descriptively. Laboratory tests were performed to test the stool and anal swab specimens of both patients and cooks as well as the environmental specimens. Risk factors related to the incidence were analyzed through a case-control study. Results: A total number of 119 patients were identified in the school...
September 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28903617/review-of-egg-related-salmonellosis-and-reduction-strategies-in-united-states-australia-united-kingdom-and-new-zealand
#19
Kapil Chousalkar, Richard Gast, Francesca Martelli, Vivek Pande
Globally, Salmonella enterica subsp. enterica is one of the most commonly reported causes of foodborne illness in humans. Contaminated food products of animal origin, particularly egg and egg products are frequently implicated in outbreaks of human salmonellosis. Salmonella enteritidis is frequently involved in egg and egg products-associated foodborne outbreaks in the USA and UK. However, in Australia and New Zealand, human infections caused by this serovar occur as a result of infection acquired while overseas travel, with Salmonella typhimurium being a predominant cause of local foodborne outbreaks...
September 14, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28888545/next-generation-sequencing-for-the-investigation-of-an-outbreak-of-salmonella-schwarzengrund-in-nanjing-china
#20
Xuefei Du, Xiao Jiang, Yanhua Ye, Baofu Guo, Wei Wang, Jie Ding, Guoxiang Xie
INTRODUCTION: Salmonella Schwarzengrund is most frequently isolated from poultry meat and can cause human infections. S. Schwarzengrund was isolated from diarrheal patients in a food poisoning event in Nanjing, China. METHODS: Three strains isolated from patients were microbiologically confirmed as S. Schwarzengrund. Salmonella strains from spiced donkey meat were also confirmed as S. Schwarzengrund. Epidemiology investigation showed evidence of a correlation between the consumption of spiced donkey meat and those cases...
September 6, 2017: International Journal of Biological Macromolecules
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