ABSTRACT
Ticks collected in the last two decades from free-living and captive wild animals from 28 municipalities of the Brazilian state of Mato Grosso were identified and tested using molecular methods for the presence of rickettsial agents. A total of 4467 ticks (229 larvae, 1676 nymphs, 1565 males, 997 females) representing 27 ixodid species were collected from 235 species of amphibians, reptiles, birds, and mammals from three different ecoregions (Pantanal, Cerrado, and Amazonia). The species Amblyomma parkeri, Amblyomma romitii, Amblyomma varium and Ixodes luciae are reported for the first time in the state of Mato Grosso. Amongst 538 ticks tested by molecular methods for rickettsial infection, we detected 'Candidatus Rickettsia amblyommii' infecting Amblyomma cajennense sensu stricto and Amblyomma coelebs, Rickettsia sp. strain Atlantic rainforest infecting Amblyomma ovale, Rickettsia sp. strain NOD infecting Amblyomma nodosum, and 'Candidatus Rickettsia andeanae' infecting Amblyomma sculptum. Our results represent an impressive expansion of knowledge on tick fauna and rickettsiae and are essential for understanding the ecology of ticks and tick-borne diseases in the Neotropical region, particularly in midwestern Brazil.
Subject(s)
DNA/genetics , Ixodidae/microbiology , Rickettsia Infections/veterinary , Tick Infestations/veterinary , Tick-Borne Diseases/veterinary , Amphibians/microbiology , Amphibians/parasitology , Animals , Birds/microbiology , Birds/parasitology , Brazil/epidemiology , Epidemiological Monitoring , Female , Ixodidae/classification , Ixodidae/genetics , Larva/genetics , Larva/microbiology , Male , Mammals/microbiology , Mammals/parasitology , Nymph/genetics , Nymph/microbiology , Phylogeography , Reptiles/microbiology , Reptiles/parasitology , Rickettsia/classification , Rickettsia/genetics , Rickettsia/isolation & purification , Rickettsia Infections/epidemiology , Rickettsia Infections/microbiology , Tick Infestations/epidemiology , Tick Infestations/microbiology , Tick Infestations/parasitology , Tick-Borne Diseases/epidemiology , Tick-Borne Diseases/microbiologyABSTRACT
The black-necked swan, Cygnus melanocoryphus, and the ringed teal, Callonetta leucophrys, are reported as new hosts for the nasal mite Rhinonyssus rhinolethrum (Trouessart) in Brazil.
Subject(s)
Anseriformes/parasitology , Mites/physiology , Nose/parasitology , Animals , BrazilABSTRACT
O cisne-do-pescoço-preto, Cygnus melanocoryphus, e a marreca-de-coleira, Callonetta leucophrys, são relatados como novos hospedeiros para o ácaro nasal Rhinonyssus rhinolethrum (Trouessart) no Brasil.
The black-necked swan, Cygnus melanocoryphus, and the ringed teal, Callonetta leucophrys, are reported as new hosts for the nasal mite Rhinonyssus rhinolethrum (Trouessart) in Brazil.
Subject(s)
Animals , Anseriformes/parasitology , Mites/physiology , Nose/parasitology , BrazilABSTRACT
Forty wild canids were captured by live trap at Municipalities of Pedro Osorio and Pelotas in Southern of the State of Rio Grande do Sul and they were transported to the Parasitology Laboratory at the Universidade Federal de Pelotas. After they were posted, segments of intestinal, respiratory and urinary tracts and liver were separated and examined. Animal skulls were used for taxonomic identification. Of forty wild animals trapped, 22 (55%) were Pseudalopex gymnocercus and 22 (55%) Cerdocyon thous. The most prevalent nematodes were: Ancylostoma caninum (45.4 in P. gymnocercus and 22.2% in C. thous), Molineus felineus (9.9 in P. gymnocercus and 5.6% in C. thous), Strongyloides sp. (22.7 in P. gymnocercus and 16.7% in C. thous), Trichuris sp. (13.6 in P. gymnocercus and 11.1% in C. thous), and Capillaria hepatica (13.6 in P. gymnocercus and 5.5% in C. thous). The trematodes observed were: Alaria alata (36.4 in P. gymnocercus and 50.0% in C. thous), and Asthemia heterolecithodes in 5.6% C. thous. Cestodes were identified as Spirometra sp. (61.1% in C. thous and 54.5 in P. gymnocercus), Diphyllobothriidae, (81.8 in P. gymnocercus and 77.8% in C. thous) and an Acantocephala of the genus Centrorhynchus was also observed in 5.6% of C. thous only. These results indicated the helminths fauna in wild canids from the studied area.
