Masticatory Myositis in a Guinea Pig (Cavia porcellus): A Case Report.

Masticatory myositis is an autoimmune neuromuscular disorder that affects the muscles of mastication. The affected individual has difficulties in opening or closing the mouth, pain, and swelling in the acute phase, and significant atrophy of the affected musculature in the chronic phase. A guinea pig (Cavia porcellus) with a history of chronic hyporexia, recurrent cheek teeth overgrowth, and loss of facial silhouette, was suspected of having masticatory myositis. The disease was confirmed by computed tomography and histopathological examination of muscle fragments. The patient was treated with a protocol involving corticosteroids and gabapentin, and occlusal correction procedures.

Parasitism by Amblyomma rotundatum Koch, 1844 (Acari: Ixodidae) associated with blefaritis on a red-footed tortoise (Chelonoidis carbonarius) in Rio de Janeiro state - case report.

Amblyomma rotundatum is a tick species commonly found on reptiles and amphibians. In Brazil, investigations of this ectoparasite have indicated its distribution across all Brazilian biomes, although it is concentrated in certain locations. In this context, the objective of the present study was to describe a case of parasitism by A. rotundatum in a red-footed tortoise (Chelonoidis carbonarius) in the state of Rio de Janeiro. A female red-footed tortoise (C. carbonarius), seized by the environmental police, was parasitized by a tick in the left periocular region. The tick was manually removed, preserved in 70º GL ethanol, and sent for identification at the Federal Rural University of Rio de Janeiro (UFRRJ). Based on the morphological evaluation Dantas-Torres et al. (2019), Barros-Battesti et al. (2006) and Lampo et al. (1997), a diagnosis of a female specimen of A. rotundatum was made. In conclusion, this study reports the first case of A. rotundatum parasitizing C. carbonarius in the state of Rio de Janeiro, highlighting the presence of periocular blepharitis associated with this parasitism.

Amblyomma rotundatum é uma espécie de carrapato comumente encontrada em répteis e anfíbios. No Brasil, as investigações desse ectoparasito indicam sua distribuição em todos os biomas brasileiros, embora concentrado em algumas localidades. Nesse contexto, o objetivo do presente estudo foi descrever um caso de parasitismo por A. rotundatum em jabuti-piranga (Chelonoidis carbonarius) no estado do Rio de Janeiro. Uma fêmea de jabuti-piranga (C. carbonarius), apreendida pela Polícia Ambiental, estava parasitada por carrapato na região periocular esquerda. O carrapato foi removido manualmente, preservado em etanol 70º GL e encaminhado para identificação na Universidade Federal Rural do Rio de Janeiro (UFRRJ). Com base na avaliação morfológica Dantas-Torres et al. (2019), Barros-Battesti et al. (2006) e Lampo et al. (1997), foi feito o diagnóstico de um espécime fêmea de A. rotundatum. Em conclusão, este estudo relata o primeiro caso de A. rotundatum parasitando C. carbonarius no estado do Rio de Janeiro, destacando a presença de blefarite periocular associada a este parasitismo.