Trichinellosis Tables

Number of trichinellosis cases, by source of infection and year, 2011–2015*

 Suspect Meat 2011 2012 2013  2014  2015  Total
Pork products
  Wild boar  2  1  10 0 0  13
  Farm—raised swine 1 0  0 1  0  2
  U.S. commercial pork 0 1 0  0  1  2
  Pork, foreign travel† 1  1 1 0  1  4
  Pork, unspecified  2  4  1 1  1  9
Non-pork products
   Bear  1  5  6  6  7  25
   Hamburger  0  0  0 1  0  1
Pork and non-pork products
   Pork and deer  1 0 0  0 0 1
   Unknown 7  6  3 4 3  23
 Total  15 18 21 13 13 80

* Year as reported by health department
† If the case-patient reported consuming the implicated pork product internationally, the suspect meat was classified as “pork, foreign travel.”

 

 

Proportion of outbreak associated trichinellosis cases, by year, 20112015*

Outbreak Associated† 2011
Cases     %
2012
Cases     %
2013
Cases    %
2014
Cases     %
2015
Cases     %
Total
Cases     %
Yes
No/Unknown
 2     13%
13     87%
 7     39%
11     61%
 12     57%
9       43%
 6     46%
7      54%
  6     46%
7     54%
33     41%
47     59%
Total       15        18        21        13        13        80

* Year as reported by health department
† Cases were classified as outbreak associated if there were two or more case-patients that were epidemiologically linked to the same meat product.

 

Outbreaks of trichinellosis, 2011–2015*

Year State† No. of cases Month of illness onset Implicated meat
2011  Minnesota  2 March—April Wild boar
2012  Virginia  2  January  Pork, unspecified
2012  Alaska  3  August  Unknown
2012  Minnesota, Illinois  2  October  Bear
2013  Illinois  9  February—March  Wild boar
2013  Maryland  3  October—November  Bear
2014  Colorado, Texas, Utah, Washington  4  July  Bear
2014  Alaska  2  October—November  Bear
2015  Texas  3  January—February Bear
2015§  Colorado, Idaho  3   October Bear

* Year as reported by health department
† State of residence, which may be different than the location of exposure.
§ Two cases were residents of Colorado, and one was a resident of Idaho.

 

Page last reviewed: July 5, 2017