Potential zoonotic role of the tick Amblyomma cf. oblongoguttatum (Ixodida: Ixodidae) in the bacterial transmission of Ehrlichia chaffeensis (Rickettsiales: Anaplasmataceae) in a deciduous tropical forest in Mexico
Por:
Guzmán-Cornejo, C, Herrera-Mares, A, García-Prieto, L, Oceguera-Figueroa, A, López-Pérez, AM, Dzul-Rosado, K
Publicada:
14 abr 2024
Ahead of Print:
1 abr 2024
Resumen:
Ehrlichia chaffeensis is a bacterium belonging to the Anaplasmataceae family. In Mexico, only 2 species have been recorded in association with tick species and humans. The objective of the present study was to detect the presence of bacteria of the genus Ehrlichia in ticks collected from the Chamela-Cuixmala Biosphere Reserve, Jalisco, Mexico. The collected ticks were identified and analyzed individually by polymerase chain reaction to amplify a fragment of the Anaplasmataceae 16S rRNA gene and the Ehrlichia-specific dsb gene. A total of 204 ticks, corresponding to 5 species of Ixodidae and 1 of Argasidae, were collected from 147 mammals of 6 species and 4 orders; 57 ticks collected from vegetation were also included. Among the total ticks collected, 1.47% (3/204) was positive for Ehrlichia sp. DNA was obtained using the primers EHR 16SD and EHR 16SR for 16S rRNA and DSB-330 and DSB-728 for dsb. The positive samples corresponded to a larva (Amblyomma sp.) associated with Didelphis virginiana and 2 nymphs (Amblyomma cf. oblongoguttatum) infesting Nasua narica. None of the ticks collected from the vegetation tested positive for Ehrlichia sp. DNA on the basis of the 16S rRNA and dsb genes. The sequences from the larvae of Amblyomma sp. and the nymphs of A. cf. oblongoguttatum were similar to those of E. chaffeensis. The phylogenetic analysis inferred with maximum likelihood corroborated the identity as E. chaffeensis. Although the role of these tick species as vectors of E. chaffeensis is still undetermined, the presence of infected ticks in the area indicates a potential zoonotic risk.
Filiaciones:
Guzmán-Cornejo, C:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Comparada, Lab Acarol, Ciudad De Mexico 04510, Mexico
Herrera-Mares, A:
Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Dept Etol, Lab Ecol Enfermedades & Una Salud, Ciudad De Mexico, Mexico
García-Prieto, L:
Univ Nacl Autonoma Mexico, Dept Zool, Lab Helmintol, Inst Biol, Ciudad De Mexico 04510, Mexico
Oceguera-Figueroa, A:
Univ Nacl Autonoma Mexico, Dept Zool, Lab Helmintol, Inst Biol, Ciudad De Mexico 04510, Mexico
López-Pérez, AM:
Inst Ecol INECOL AC, Red Biol & Conservac Vertebrados, Veracruz, Mexico
Dzul-Rosado, K:
Univ Autonoma Yucatan, Ctr Invest Reg Dr Hideyo Noguchi, Merida, Yucatan, Mexico
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