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Trichinellosis outbreak.

Marva E, Markovics A, Gdalevich M, Asor N, Sadik C, Leventhal A - Emerging Infect. Dis. (2005)

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Trichinellosis is a zoonotic disease caused by the nematode Trichinella... Serologic tests were performed on all 47 workers 2–4 weeks after they ate the infected meat (first time point), 6 and 8 weeks later (second time point), or both... Workers with no clinical symptoms were divided into 2 subgroups... Asymptomatic case-patients were workers with >1 positive serologic test result with or without elevated absolute eosinophil count... Nonpatients were workers whose serologic results remained negative during the 2 months of study, with normal absolute eosinophil count... At the onset of symptoms, 2 weeks after the meal, 26 patients arrived at the emergency room of Barzilai Hospital, Ashkelon, with abdominal pain with various degrees of myalgia (23 [88%]), fever (3 [11%]), periorbital edema (11 [42%]), headache (12 [46%]), rash (9 [34%]), and cough (1 [4%])... Only 1 patient did not seroconvert during the 2-month study... Of 18 symptomatic patients, 13 (72%) were positive at the first time point (mean ± standard deviation [SD] OD 0.87± 0.80; in another 4 patients, seroconversion was observed at the second time point... At this second time point, 21 persons were tested, and 20 (95%) were positive (OD 2.89 ± 1.16)... No direct correlation was observed between severity of symptoms, degree of eosinophilia, and antibody levels (OD)... The attack rate in this outbreak was higher (85%) than that in other published outbreaks... One explanation for this high rate could be that our case definition was broader and included any exposed person who had a positive serologic result during the 2-month study period... Moreover, all those who ate the investigated meal gave at least 1 blood sample... In other outbreaks, only samples from acute symptomatic patients were taken, the follow-up was incomplete because some patients did not return for convalescent-phase serologic testing, or not all the affected persons were studied.

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Trichinella larvae in a sample of infected meat (light microscopy, ×100).
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Figure 1: Trichinella larvae in a sample of infected meat (light microscopy, ×100).

Mentions: All the persons who ate the infected meat were treated with mebendazole, 5 mg/kg twice a day for 5 days. All symptomatic patients recovered. Epidemiologic investigation indicated that 1 large piece of meat was put in boiling water for just a few minutes before being eaten. The meat that remained from the meal was examined microscopically, and encysted Trichinella larvae were identified (Figure).


Trichinellosis outbreak.

Marva E, Markovics A, Gdalevich M, Asor N, Sadik C, Leventhal A - Emerging Infect. Dis. (2005)

Trichinella larvae in a sample of infected meat (light microscopy, ×100).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3367633&req=5

Figure 1: Trichinella larvae in a sample of infected meat (light microscopy, ×100).
Mentions: All the persons who ate the infected meat were treated with mebendazole, 5 mg/kg twice a day for 5 days. All symptomatic patients recovered. Epidemiologic investigation indicated that 1 large piece of meat was put in boiling water for just a few minutes before being eaten. The meat that remained from the meal was examined microscopically, and encysted Trichinella larvae were identified (Figure).

View Article: PubMed Central - PubMed

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

Trichinellosis is a zoonotic disease caused by the nematode Trichinella... Serologic tests were performed on all 47 workers 2–4 weeks after they ate the infected meat (first time point), 6 and 8 weeks later (second time point), or both... Workers with no clinical symptoms were divided into 2 subgroups... Asymptomatic case-patients were workers with >1 positive serologic test result with or without elevated absolute eosinophil count... Nonpatients were workers whose serologic results remained negative during the 2 months of study, with normal absolute eosinophil count... At the onset of symptoms, 2 weeks after the meal, 26 patients arrived at the emergency room of Barzilai Hospital, Ashkelon, with abdominal pain with various degrees of myalgia (23 [88%]), fever (3 [11%]), periorbital edema (11 [42%]), headache (12 [46%]), rash (9 [34%]), and cough (1 [4%])... Only 1 patient did not seroconvert during the 2-month study... Of 18 symptomatic patients, 13 (72%) were positive at the first time point (mean ± standard deviation [SD] OD 0.87± 0.80; in another 4 patients, seroconversion was observed at the second time point... At this second time point, 21 persons were tested, and 20 (95%) were positive (OD 2.89 ± 1.16)... No direct correlation was observed between severity of symptoms, degree of eosinophilia, and antibody levels (OD)... The attack rate in this outbreak was higher (85%) than that in other published outbreaks... One explanation for this high rate could be that our case definition was broader and included any exposed person who had a positive serologic result during the 2-month study period... Moreover, all those who ate the investigated meal gave at least 1 blood sample... In other outbreaks, only samples from acute symptomatic patients were taken, the follow-up was incomplete because some patients did not return for convalescent-phase serologic testing, or not all the affected persons were studied.

Show MeSH