Abstract
We report an outbreak of trichinosis from the consumption of locally processed, cold smoked wild boar meat of a domestically reared animal from a farm in Dufferin County, Ontario.
Between January and March 1993, 24 cases of trichinosis were identified and of these, 21 patients were symptomatic. The most common symptoms were myalgia (75%), weakness (75%), fever (71%) and periorbital edema (67%). Eosinophilia and elevated creatine phosphokinase levels were noted in 86% and 89% of patients respectively. Trichinella serology was positive in 55%. Two patients were hospitalized, one with severe diarrhoea and another with myalgia and fever. Several patients appeared to improve temporarily after treatment with albendazole.
This outbreak reminds us that although trichinosis is rare in Ontario, physicians must maintain a high index of suspicion for the disease. To prevent further outbreaks, the Ontario Government has instituted new guidelines for the processing of all wild boar meat.
Résumé
Nous rapportons ici une éclosion de trichinose en Ontario associée à la consommation de viande froide fumée localement et provenant d’un sanglier sauvage gardé en élevage sur une ferme du comté de Dufferin.
Entre janvier et mars 1993, 24 cas de trichinose furent identifiés, dont 21 patients symptomatiques. Les symptômes les plus fréquents étaient : myalgies (75 %), faiblesse (75 %), fièvre (71 %) et oedème péri-orbital (67 %). L’eosinophilic et une élévation des niveaux de créatinine-phosphokinase étaient présentes chez 86 % et 89 % des patients respectivement. La sérologie pour trichinella était positive dans 55 % des cas. Deux patients furent hospitalisés, un présentant des diarrhées sévères et l’autre des myalgies et de la fièvre. Plusieurs patients notèrent une amélioration temporaire après un traitement avec l’albendazole.
Cette éclosion nous rappelle que, bien que la trichinose soit rare en Ontario, les médecins doivent continuer à l’inclure dans leurs diagnostics différentiels. Pour prévenir d’autres éclosions, les autorités sanitaires ontariennes ont mis en place de nouvelles lignes directrices pour le traitement de toute viande de sanglier sauvage.
Similar content being viewed by others
References
Dorland R. Ministry of Health Report, July 15, 1977.
MacLean JD, Poirier L, Gyorkas TW, et al. Epidemiologic and serologic definition of primary and secondary trichinosis in the Arctic. J Infect Dis 1993;162:908–12.
MacLean JD, Viallet J, Law C, Staudt M. Trichinosis in the Canadian Arctic: Report of five outbreaks and a new clinical syndrome. J Infect Dis 1989;160:513–20.
Gray DF, Morse BS, Phillips WF. Trichinosis with neurologic and cardiac involvement, review of the nature and report of three cases. Ann Intern Med 1962;57:230–44.
Hulbert T, Larsen R. Review of Trichinosis with a report of a case. Inf Dis Clin Practice 1993;2:21–30.
Spink WW. Cardiovascular complications of trichinosis. Arch Intern Med 1935;56:238–49.
Centers for Disease Control. Trichinosis surveillance, United States, 1986. MMWR 1987;37:1–8.
Centers for Disease Control. Trichinella spiralis infection-United States, 1990. MMWR 1991;40:57–60.
Feldmeier H, Bienzle U, Jansen-Rosseck R, et al. Sequelae after infection with Trichinella spiralis: A prospective cohort study. Wien Klin Wochenscrift 1991;103(4):111–16.
Froscher W, Gullotta F, Saathoff M, Tackmann W. Chronic trichinosis. Clinical, bioptic, serologic and electromyographic observations. Eur Neurol 1988;38(4):221–26.
Harms G, Binz P, Feldmeier H. Trichinosis: A prospective control study of patients ten years after acute infection. CID 1993;17:637–43.
Morakote N, Sukhavat K, Khamboonruang C, et al. Persistence of IgG, IgM, and IgE antibodies in human trichinosis. Trop Med Parasitol 1992;43(3):167–69.
Olaison L, Ljungström I. An outbreak of trichinosis in Lebanon. Trans Soc Trop Med Hyg 1992;86:658–60.
Drugs for Parasitic Infection. The Medical Letter. 1988;30 Issue 759:15–24.
Levin ML. Treatment of Trichinosis with Mebendazole. Am J Trop Med Hygiene 1983;32(5);980–83.
Fourestié V, Bougnoux ME, Ancelle T, et al. Randomized trial of albendazole versus thiabendazole plus flubendazole during an outbreak of human trichinellosis. Parasitol Res 1988;75:36–41.
Ryczak M, Sorber WA, Kandor TF, et al. Difficulties in diagnosis of trichinella encephalitis. Am J Trop Med Hyg 1987;36:573–75.
Bailey TM, Schantz PM. Trends in the incidence and transmission patterns of trichinosis in humans in the United States: Comparisons of the periods 1975–1981 and 1982–1986. Rev Infect Dis 1990;12:5–11.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Greenbloom, S.L., Martin-Smith, P., Isaacs, S. et al. Outbreak of Trichinosis in Ontario Secondary to the Ingestion of Wild Boar Meat. Can J Public Health 88, 52–56 (1997). https://doi.org/10.1007/BF03403860
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF03403860