The presence of antibodies for hepatitis a virus in amazonia Didelphis marsupialis (Vertebrata, Marsupialia)

Zoonoses are diseases or infections naturally transmissible from vertebrate animals to humans, and can be bacterial, viral or parasitic. The growth of urbanization, industrialization and the advance of agriculture and livestock facilitate the spread of infectious and parasitic agents from wild animals to the human population and to their domestic animals. Among the various reservoirs of zoonotic agents, we find that didelphid species, due to their high capacity for adaptation in urban environments, as an important study case. We reviewed the literature data on the pathogens, including with zoonotic potential of marsupial species occurring in Brazil, accounted for infections by agents that we categorized into Bacteria, Viruses, Protozoa, and Helminths. Aiming identifies possible knowledge gaps, we also surveyed the origin of studied samples and the institutions leading the researches on host didelphids. Among the hosts, the genus Didelphis in the cycles of these agents stands out. Moreover, we found that the majority of reported cases are in the Southeastern Brazil, mean the data from other Brazilian localities and didelphid species could be underestimated. Most studies took place in graduate programs of public research institutions, emphasizing the importance of the funding public research for the Brazilian scientific development.

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Infection agents of Didelphidae (Didelphimorphia) of Brazil: an underestimated matter in zoonoses research

Bitencourt

Bezerra

2021

Mammalia

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Serological markers for hepatitis a among captive and free-living wild mammals in the State of Pará, Brazil

Filho¹,

Souza²,

Nunes³

et al. 2021

Semina: Ciênc. Agrár.

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The hepatitis A virus (HAV, Hepatovirus A) in humans has a relevant impact on public health, especially in geographic regions with poor basic sanitation, such as the Brazilian Amazon. Isolates related to hepatoviruses have been described in non human primates, chiropterans, marsupials, rodents, marmots, shrews, and terrestrial hedgehogs. However, the circulation of these viruses in the Amazonian mammal fauna remains unexplored. This study aimed to evaluate the prevalence of antibodies against this hepatovirus in captive and free-living wild mammals belonging to the orders Didelphimorphia, Primates, Carnivora, and Artiodactyla. Serum samples from 71 animals, from three municipalities in the State of Pará (Belém, Santarém, and Capitão-Poço) were tested for total anti-HAV and anti-HAV IgM through enzyme-linked immunosorbent assay (ELISA). Total anti-HAV antibodies were detected in 29.5% (21/71) of non-human primates, 8.4% (6/71) of carnivores, and 5.6% (4/71) of didelphos. All tayassuidos 0% (0/2) were seronegative. Anti-HAV IgM antibodies were not detected in any of the samples tested. The highest total anti-HAV seropositivity in the municipalities studied was in Santarém with 54.24% (12/22), followed by Capitão Poço with 50% (15/30), and then Belém with 21.05% (4/19). Among the seropositive animals, animals kept in exposure cages showed 43.9% (18/41), quarantined animals with 60% (9/15), and free-living animals with 26.6% (4/15). The serological results indicated a profile of previous exposure to hepatovirus among these animals. Therefore, additional studies to characterize HAV-related viruses in captive and free living wild animals need to be conducted to better understand the impact of the circulation of this virus on human and animal health.

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The presence of antibodies for hepatitis a virus in amazonia Didelphis marsupialis (Vertebrata, Marsupialia)

Abstract: Anti-HAV was detected by enzyme - immunoassay in sera collected from 6 (18,75%) of 32 Didelphis marsupialis trapped in the Amazon region. No anti-HAV were found in the sera from 136 other wild animals, including small rodents, reptiles and other marsupials.

Cited by 2 publications

References 3 publications

Infection agents of Didelphidae (Didelphimorphia) of Brazil: an underestimated matter in zoonoses research

Infection agents of Didelphidae (Didelphimorphia) of Brazil: an underestimated matter in zoonoses research

Serological markers for hepatitis a among captive and free-living wild mammals in the State of Pará, Brazil

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