Pesquisa de Trichinella spiralis em roedores capturados na zona portuária de Santos

Paim, Gil Vianna; Côrtes, Valdson de Angelis

doi:10.1590/s0034-89101979000100008

Cited by 5 publications

(2 citation statements)

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“…Historically, Brazil is free from Trichinella spp. infection in synanthropic rodents [ 28 ], domestic swine [ 19 , 29 , 30 , 31 , 32 ], and horses [ 33 , 34 ], and the disease was never reported in humans. However, even though the OIE recognizes Brazil as free from the domestic cycle of Trichinella spp., serosurveillance in wild boars from São Paulo, Mato Grosso, Santa Catarina, and Rio Grande do Sul States revealed seropositive animals in the iELISA test, changing the country’s status for the wild cycle, after an official communication by the government agencies [ 19 ].…”

Section: Discussionmentioning

confidence: 99%

Seropositive Wild Boars Suggesting the Occurrence of a Wild Cycle of Trichinella spp. in Brazil

Silva

Mendonça

Machado

et al. 2022

Animals

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Trichinella is a zoonotic nematode traditionally detected worldwide in both domestic and wild animals. In South America, along with the occurrence of this parasite in domestic pigs and wild boars, there are reports of infection in wild carnivores. Brazil is considered free of the domestic cycle of Trichinella, but there is unpublished serological evidence of infection in wild boars, which changed the Brazilian status in OIE regarding the disease after an official communication. We investigated Trichinella spp. infection in wild boars and wild carnivores in the Southeastern region of Brazil. A total of 136 samples were tested, 121 from wild boars and 15 from wild carnivores. Artificial enzymatic digestion (AED) tests were performed on muscle samples from 37 wild boars and 15 wild carnivores, and 115 serum samples from wild boars were tested by iELISA. Seven serum samples from wild boars tested positive (7/115 = 6.1%, 95% CI 3.0–12.0), but no larvae were found in the AED. There was no significant difference between sex, age, and location of the samples. The serological results suggest that a wild cycle of Trichinella spp. may occur in Brazil, but further analyses should be performed to confirm the presence of the parasite.

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Section: Discussionmentioning

confidence: 99%

Seropositive Wild Boars Suggesting the Occurrence of a Wild Cycle of Trichinella spp. in Brazil

Silva

Mendonça

Machado

et al. 2022

Animals

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“…Our negative result is similar with other studies performed in Brazil, such as that by Catão et al (1975), who also used the artificial digestion method to analyze 6,452 diaphragms of adult swine from the states of Paraná, Minas Gerais, São Paulo, and Goiás and found no larvae. Subsequently, Paim & Côrtes (1979) examined 594 diaphragms of Rattus norvegicus from the port area of Santos, São Paulo state, using the trichinoscopy technique and detected no parasite larvae. In the same way, Daguer et al (2005) performed artificial digestion of different muscle samples of 3,774 adult pigs from 68 municipalities in the southern region of Paraná, all of them with negative results.…”

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confidence: 99%

Absence of Trichinella spp. larvae in carcasses of road-killed wild animals in Paraná state, Brazil

Jurkevicz

Silva

Neto

et al. 2022

Rev. Bras. Parasitol. Vet.

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Trichinella spp. are zoonotic parasites that are widely distributed in warm-blooded carnivores and omnivores, including humans. Until the present moment, Brazil has been considered by World Animal Health Organization free from the domestic cycle of trichinellosis, whereas the parasite’s sylvatic cycle has the status of infection in limited zones. However, neighboring countries such as Argentina have reports of parasite larvae in the wild fauna. The present study aimed to determine the occurrence of Trichinella spp. in road-killed wild animals in Paraná, Brazil. Biological samples from 71 wild animals—29 Didelphis albiventris, 11 Nasua nasua, ten Cerdocyon thous, seven Dasypus novemcinctus, six Leopardus guttulus, six Sphiggurus spinosus and two Puma concolor—collected from November 2016 to November 2021 were subjected to artificial digestion, following the methodology described in the REGULATION (EC) No. 2075/2005. No Trichinella spp. larvae were detected in the carcasses of the road-killed wild animals. However, considering the wide spectrum of possible reservoirs that could act as a link between the sylvatic and domestic cycles and considering the current Brazilian status of sylvatic trichinellosis in limited zones, frequent monitoring of wild fauna remains necessary.

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