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Volume 19, Number 1—January 2013

CME ACTIVITY

Listeriosis Outbreaks and Associated Food Vehicles, United States, 1998–2008

Earning CME Credit

To obtain credit, you should first read the journal article. After reading the article, you should be able to answer the following, related, multiple-choice questions. To complete the questions (with a minimum 70% passing score) and earn continuing medical education (CME) credit, please go to www.medscape.org/journal/eid. Credit cannot be obtained for tests completed on paper, although you may use the worksheet below to keep a record of your answers. You must be a registered user on Medscape.org. If you are not registered on Medscape.org, please click on the New Users: Free Registration link on the left hand side of the website to register. Only one answer is correct for each question. Once you successfully answer all post-test questions you will be able to view and/or print your certificate. For questions regarding the content of this activity, contact the accredited provider, CME@medscape.net. For technical assistance, contact CME@webmd.net. American Medical Association’s Physician’s Recognition Award (AMA PRA) credits are accepted in the US as evidence of participation in CME activities. For further information on this award, please refer to http://www.ama-assn.org/ama/pub/category/2922.html. The AMA has determined that physicians not licensed in the US who participate in this CME activity are eligible for AMA PRA Category 1 Credits™. Through agreements that the AMA has made with agencies in some countries, AMA PRA credit may be acceptable as evidence of participation in CME activities. If you are not licensed in the US, please complete the questions online, print the certificate and present it to your national medical association for review.

Article Title:
Listeriosis Outbreaks and Associated Food Vehicles, United States, 1998–2008

CME Questions

1. You are seeing a 25-year-old woman in her 10th week of pregnancy with a 2-day history of mild fever, loose stools, and vomiting. She reports that she has not eaten unusual foods in the past week. You wonder whether this patient might have listeriosis. What should you consider regarding the epidemiology of listeriosis?

A. Infection with Listeria is marked by at least mild gastrointestinal symptoms among pregnant women

B. There are fewer than 200 cases of listeriosis in the United States annually

C. The incidence of listeriosis increased from 1996 to 2003

D. The incidence of listeriosis has remained fairly stable since 2003

2. What should you consider regarding listeriosis outbreaks evaluated in the current study?

A. There were 24 confirmed outbreaks between 1998 and 2008

B. Less than one third of patients required hospitalization

C. The median duration of outbreaks was 6 months

D. Listeriosis most commonly affected infants

3. What was the most common food vehicle for listeriosis in the current study?

A. Deli meats

B. Cheese made from unpasteurized milk

C. Frankfurters

D. Sprouts and other vegetables

4. What else should you consider regarding outbreaks of listeriosis in the current study?

A. Serotype 1/2a accounted for most outbreaks of listeriosis

B. Serotype 4b was associated with the highest hospitalization rate

C. Outbreaks recorded later in the study period involved more cases

D. The number of outbreaks associated with processed meats increased throughout the study period

Activity Evaluation

1. The activity supported the learning objectives.

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2. The material was organized clearly for learning to occur.

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3. The content learned from this activity will impact my practice.

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4. The activity was presented objectively and free of commercial bias.

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