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Human diphyllobothriasis: reports from Rio de Janeiro, Brazil
Luiz E R Tavares1, José L Luque, Teresa C B do Bomfim
1Universidade Federal Rural do Rio de Janeiro, Instituto de Veterinária, Departamento de Parasitologia Animal, Caixa Postal 74508, CEP: 23851-970, Seropédica, RJ, Brazil.
Summary
Diphyllobothrid tapeworm eggs were found in five adults in Rio de Janeiro who consumed raw fish. This indicates a potential public health concern related to fish-borne parasites in the region.
Area of Science:
- Parasitology
- Infectious Diseases
- Public Health
Background:
- Diphyllobothriasis is a parasitic infection caused by tapeworms of the genus Diphyllobothrium.
- Raw or undercooked fish consumption is a primary risk factor for diphyllobothriasis.
- Gastrointestinal disturbances can be symptoms of parasitic infections.
Purpose of the Study:
- To report the occurrence of diphyllobothrid operculated eggs in human stool samples.
- To identify the characteristics of the detected tapeworm eggs.
- To investigate potential links between diet and parasitic infection in the study population.
Main Methods:
- Stool samples were collected from five adult individuals presenting with gastrointestinal symptoms.
- Microscopic examination of stool samples was performed to identify parasitic eggs.
- Morphological analysis of the eggs was conducted, focusing on operculum and abopercular knob presence.
Main Results:
- Operculated diphyllobothrid eggs with a distinct abopercular knob were identified in all five stool samples.
- The individuals reported regular consumption of raw fish, including sushi and sashimi.
- Gastrointestinal disturbances were a common symptom among the infected individuals.
Conclusions:
- The findings confirm the presence of Diphyllobothrium tapeworm infections in Rio de Janeiro, Brazil.
- Raw fish consumption, particularly sushi and sashimi, is a likely transmission route.
- Public health awareness and parasite control measures regarding raw fish consumption are warranted.
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