2012
DOI: 10.4269/ajtmh.2012.12-0075
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Outbreak of Human Trichinellosis in Northern California Caused by Trichinella murrelli

Abstract: Abstract. In October of 2008, an outbreak of trichinellosis occurred in northern California that sickened 30 of 38 attendees of an event at which meat from a black bear was served. Morphologic and molecular testing of muscle from the leftover portion of bear meat revealed that the bear was infected with Trichinella murrelli, a sylvatic species of Trichinella found in temperate North America. Clinical records revealed a high attack rate for this outbreak: 78% for persons consuming any bear meat and 100% for per… Show more

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Cited by 40 publications
(35 citation statements)
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“…In a 1990 Virginia outbreak, a meat handler who developed trichinellosis worked at a pork processing plant where implicated pork sausage was produced but denied consuming the pork sausage [20]. Cross-contamination of other food products from contaminated meat has also been suggested as a possible route of exposure [6]. In the current outbreak, the family also consumed 2 roasts that were frozen for 6 days following processing.…”
Section: Discussionmentioning
confidence: 99%
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“…In a 1990 Virginia outbreak, a meat handler who developed trichinellosis worked at a pork processing plant where implicated pork sausage was produced but denied consuming the pork sausage [20]. Cross-contamination of other food products from contaminated meat has also been suggested as a possible route of exposure [6]. In the current outbreak, the family also consumed 2 roasts that were frozen for 6 days following processing.…”
Section: Discussionmentioning
confidence: 99%
“…Confirmation to the species level was performed using a multiplex polymerase chain reaction (PCR) based on amplification of regions of the internal transcribed spacers 1 and 2 and the expansion segment V region of the ribosomal RNA gene [8]. The larval concentration in several meat products was determined by counting the larvae found in 1-g samples of partially digested muscle [6]. Larvae infectivity was determined by orally inoculating larvae recovered from each tissue digestion into 5 Swiss-Webster mice.…”
Section: Methodsmentioning
confidence: 99%
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“…There was no evidence of ST elevation on ECG, and chest x-ray was normal. CSF analysis showed glucose of 57.6 mg/dL, protein 34 mg/dL, erythrocytes 9.5/mm 3 , leukocytes 3.6/mm 3 , and a negative Gram stain and culture. There were too few leukocytes in the CSF to provide a differential.…”
Section: Oy-stersmentioning
confidence: 99%
“…2 Patients with trichinosis may present with diarrhea, fever, periorbital edema, weakness, rash, and myalgias. 3 Bloodwork shows marked eosinophilia. Trichinella infection of the CNS, referred to as neurotrichinosis, occurs in as few as 0.2% but as many as 52% of cases and represents serious infection.…”
Section: Oy-stersmentioning
confidence: 99%