Abstract
Background: An outbreak of salmonellosis (Salmonella Typhimurium, phage type DT120) occurred from 26 January to 15 March 2011, in Denmark, with 22 laboratory confirmed cases. ...Hypothesis-generating patient interviews gave rise to the suspicion that smoked pork tenderloin was the source of infection. The primary objective of this study was to identify the source of the outbreak in order to initiate appropriate control measures. Methods: A matched (1:2) case-control study was conducted. A case was defined as a person residing in Denmark whose stool sample tested positive for S. Typhimurium, with a particular multilocus variable-number tandem repeat profile, from January to March 2011. Controls were matched to cases on age, gender, and municipality of residence. Results: Of 21 interviewed cases, 19 (91%) indicated that they typically ate smoked pork tenderloin more than once a week, compared with 13 (33%) of 39 interviewed controls (matched odds ratio 19.6, 95% confidence interval 2.6-153). Eighteen (86%) cases indicated that they might have consumed smoked pork tenderloin the week before becoming ill, compared with 1 (4%) control who had eaten the product a week before the interview. Two cases provided the brand name of the product and the supermarket where it was purchased. Conclusions: The results show a strong statistically significant association between the consumption of smoked pork tenderloin and S. Typhimurium infection. The European Rapid Alert System for Food and Feed was used to notify these findings to the competent authorities in the country of origin of the product. Subsequently, the smoked pork tenderloin of the brand in question, dating from 1 January to 1 May 2011, was recalled from consumers.
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Dostopno za:
DOBA, IJS, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
In the 1990s, studies were conducted to investigate 16 episodes of sudden unexpected cardiac death (SUCD) among Swedish elite orienteers during the period from 1979 to 1992. A case control study ...revealed that a significantly higher proportion of Swedish elite orienteers were B. elizabethae seropositive compared to controls. The aim of our study, designed as a case-control study, was to determine whether similarly high rates of B. elizabethae seropositivity were present among Danish elite orienteers. Cases were 43 elite orienteers; controls were 159 blood donors and 63 elite indoor sportsmen. All participants were tested for antibodies against B. henselae, B. quintana and B. elizabethae using immunofluorescent antibody tests. Surprisingly, Bartonella antibodies were only detected in sera from 5 persons: B. henselae from 1 elite orienteer, 1 handball player and 1 blood donor. B. elizabethae antibodies were detected in 1 handball player and 1 basketball player. We found no association between elite orienteers and the prevalence of Bartonella antibody positivity. This is in contrast to the Swedish study, and might be explained by the use of different serological methods in the 2 studies; to determine whether it is a true difference, a new study is needed.
Celotno besedilo
Dostopno za:
DOBA, IJS, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
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