26 research outputs found
Principais doenças parasitárias e infecciosas em equinos do Pantanal
O bioma Pantanal possui grande diversidade de fauna e flora, além de ser a maior planície alagável do mundo. Intercala períodos de chuva e seca, proporcionando o ambiente ideal para a proliferação de vetores e patógenos. O cavalo é de fundamental importância nos sistemas de produção de bovinos de corte, atuando no manejo do gado, como meio de transporte, principalmente nas regiões de difícil acesso. Não menos importante, é peça fundamental para o ecoturismo na região, atividade cada dia mais explorada. Estes animais podem entrar em contato com diversos agentes que podem causar doenças, como hemoparasitoses, anemia infecciosa e pitiose, que embora sejam frequentes na rotina clínica, são muitas vezes negligenciadas e responsáveis por grandes prejuízos econômicos. O presente trabalho de revisão de literatura tem como objetivo abordar os diversos aspectos dessas afecções, como etiologia, epidemiologia, patogenia e sintomatologia clínica, contemplando também diagnóstico, terapêutica, medidas de controle e profilaxia. 
Ornithodoros faccinii n. sp. (Acari: Ixodida: Argasidae) parasitizing the frog Thoropa miliaris (Amphibia: Anura: Cycloramphidae) in Brazil
Abstract\ud
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Background\ud
Most argasid ticks from the Neotropical region are parasites of mammals and birds, with a few records from reptiles. Many species of the genus Ornithodoros are known only through larval descriptions, and their chaetotaxy and morphological characteristics have been used to separate the taxa. In the present study, we describe the larva and the nymph of first instar of a new species of the genus Ornithodoros that was collected from frogs of the species Thoropa miliaris.\ud
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Methods\ud
Larvae of Ornithodoros were collected from frogs of the species T. miliaris at waterfalls in the state of Rio de Janeiro, southeastern Brazil. The larval and nymphal description was based on optical and scanning electron microscopy. Molecular analysis using the argasid 16S rRNA sequences available in GenBank was also conducted.\ud
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Results\ud
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Ornithodoros faccinii sp. n. is closely related to Ornithodoros clarki Jones & Clifford, Ornithodoros marinkellei Kohls, Clifford & Jones, Ornithodoros capensis Neumann and Ornithodoros sawaii Kitaoka & Susuki. However, the larval morphology of the new species is unique. The mitochondrial 16S rDNA partial sequence of O. faccinii generated in the present study was deposited in GenBank under the number KP861242.\ud
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Conclusions\ud
The larvae collected from Thoropa miliaris are a new species, Ornithodoros faccinii n. sp. This is the first report of argasid ticks on frogs in Brazil, the second on frogs and the third on Amphibia in the Neotropical region
Concepts in Animal Parasitology, Part 5: Ectoparasites
Part V: Ectoparasites, chapters 60-67, pages 732-841, in Concepts in Animal Parasitology. 2024. Scott L. Gardner and Sue Ann Gardner, editors. Zea Books, Lincoln, Nebraska, United States; part V doi: 10.32873/unl.dc.ciap075
Platyhelminthes
Chapter 60: Monogenea (Class) by Griselda Pulido-Flores, pages 733-742
Chapter 61: Transversotremata (Suborder): Ectoparasitic Trematodes by Scott C. Cutmore and Thomas H. Cribb, pages 743-746
Hirudinia
Chapter 62: Hirudinia (Class): Parasitic Leeches by Alejandro Oceguera-Figueroa and Sebastian Kvist, pages 747-755
Arthropoda
Chapter 63: Siphonaptera (Order): Fleas by Marcela Lareschi, pages 756-770
Chapter 64: Phthiraptera (Order): Lice by Lajos Rózsa and Haylee J. Weaver, pages 771-789
Chapter 65: Triatominae (Subfamily): Kissing Bugs by numerous authors cited from open access sources, compiled by Sue Ann Gardner, pages 790-797
Chapter 66: Acari (Order): Ticks by Darci Moraes Barros-Battesti, Valeria Castilho Onofrio, and Filipe Dantas-Torres, pages 798-835
Chapter 67: Acari (Order): Mites by David Evans Walter, Gerald W. Krantz, and Evert E. Lindquist, pages 836-84
Canine leptospirosis in asymptomatic populations from the Southwest Region of São Paulo State, Brazil
A leptospirose é uma enfermidade infectocontagiosa que pode acometer os animais e o homem. Nos países tropicais e em desenvolvimento ocorrem 70% dos casos humanos, com mortalidade variando entre 10 a 70%. Os cães podem se tornar portadores assintomáticos por um longo período, podendo transmitir a Leptospira para humanos. Devido ao intenso convívio com o ser humano, os cães podem servir como sentinelas da contaminação ambiental. Esse trabalho investigou a frequência de ocorrência da leptospirose canina em populações assintomáticas da região sudoeste do estado de São Paulo. Para isso foram examinadas pela técnica de soroaglutinação microscópica (MAT), amostras de sangue provenientes de 572 cães assintomáticos dos municípios de Apiaí, Cananeia, Itapeva e Itu por amostragem de conveniência, oriundos de campanhas de castração. Em Apiaí, foram encontrados 40,5% dos animais reagentes para Leptospira spp.; em Itapeva, 42,6%; em Cananeia, 7,7% e em Itu, 5,1%. Os dados encontrados demonstram que, pelo menos, um animal dos municípios de Itapeva, Apiaí e Cananeia apresentaram título igual ou maior que 800, indicando a circulação da bactéria nessas localidades e que a equipe envolvida nas campanhas de castração precisam ser alertadas sobre o correto uso de equipamento de proteção individual, principalmente no esvaziamento mecânico da bexiga antes do procedimento cirúrgico. O estudo também sugere que as campanhas de castração podem ser estratégicas no monitoramento de doenças zoonóticas e poderiam auxiliar no estabelecimento de ações preventivas para a saúde humana e animal.Leptospirosis is an infectious disease that can affect animals and humans. Distributed worldwide, the disease is more prevalent in tropical regions due to socioenvironmental characteristics. Dogs can serve as sentinels for environmental contamination due to their frequent contact with humans. This study investigated the frequency of occurrence of canine leptospirosis in asymptomatic populations from the Southwest Region of the State of São Paulo, Brazil. Thus, blood samples collected from 572 asymptomatic dogs from the cities of Apiaí, Cananeia, Itapeva, and Itu were tested with a microscopic agglutination test (MAT). A total of 40.5% of animals in Apiaí reacted to Leptospira spp., 42.6% in Itapeva, 7.1% in Cananeia, and 5.1% in Itu. The data from the present study demonstrate that at least one animal from the municipalities of Itapeva, Apiaí, and Cananeia had a titer equal to or higher than 800, indicating that Leptospira is circulating in these municipalities and that the teams working on castration campaigns need to be educated on the correct use of personal protective equipment, especially when mechanically emptying the bladder of these animals. This study also suggests that castration campaigns can strategically monitor zoonotic diseases and assist in establishing preventive strategies for human and animal health
Brazilian distribution of Amblyomma varium Koch, 1844 (Acari: Ixodidae), a common parasite of sloths (Mammalia: Xenarthra)
Oviposition and eclosion periods of Ixodes didelphidis Fonseca and Aragão, 1951 (Acari: Ixodidae) under laboratory conditions
Comentários sobre a validade de Haemaphysalis cinnabarina Koch, 1844 (Acari: Ixodidae) um táxon conhecido somente pelos espécimes tipos do Norte do Brasil
Os tipos de Haemaphysalis cinnabarina Koch e da espécie sinônima H. sanguinolenta Koch, ambos do Estado do Pará, Brasil, foram estudados. Embora H. cinnabarina tenha sido considerada uma sinonímia de H. punctata Canestrini e Fanzago (uma espécie Paleártica), elas foram comparadas a uma outra espécie próxima, H. chordeilis (Packard) (uma espécie Neártica). Com base em morfologia e distância geográfica entre H. cinnabarina, H. chordeilis e H. punctata, consideramos válidos os três taxa. A ausência de relatos adicionais de H. cinnabarina está mais relacionada à ausência de investigações na América do Sul, principalmente no Norte do Brasil, do que a sugestão da sua não existênciaThe types of Haemaphysalis cinnabarina Koch and its junior synonym H. sanguinolenta Koch, both from State of Pará, Brazil, have been studied. Although H. cinnabarina has been considered a synonym of H. punctata Canestrini and Fanzago (a Palearctic species), they were compared to another closely related species H. chordeilis (Packard) (a Nearctic species). Based on the morphology and geographical distance among of H. cinnabarina, H. chordeilis and H. punctata, we are reasonably sure that all are valid taxa. The lack of additional reports of H. cinnabarina is more related to few investigations in South America, mainly in Northern Brazil, rather than suggesting that it does not exis
Brazilian Distribution of Amblyomma varium Koch, 1844 (Acari: Ixodidae), a Common Parasite of Sloths (Mammalia: Xenarthra)
Amblyomma varium , commonly known in Brazil as the
"carrapato-gigante-da-preguiça" (sloth's giant tick) is found from
southern Central America to Argentina. The present study adds
information on the geographical distribution of A. varium, as well as
on their hosts, based on material deposited in the main Brazilian
collections and on the available literature. Eighty-two vials,
containing 191 adult specimens, deposited in five Acari collections
between 1930 and 2001, were examined. These vials included data on the
host and collection localities. The biology of A. varium is unknown.
However it is known that, during the adult stage, the tick presents a
high host specificity and is found almost exclusively on the sloths
Bradypus tridactylus , B. variegatus, B. torquatus
(Bradypodidae), Choloepus hoffmanni and C. didactylus
(Megalonychidae). Based on the material examined, the states of
Rondônia, Amazonas, Bahia and Alagoas are newly assigned to
geographic distribution of A. varium in Brazil
Diagnoses of and illustrated key to the species of Ixodes Latreille, 1795 (Acari: Ixodidae) from Brazil
The current Brazilian Ixodes fauna is composed of the following eight species: I. amarali Fonseca, 1935; I. aragaoi Fonseca, 1935; I. auritulus Neumann, 1904; I. fuscipes Koch, 1844; I. loricatus Neumann, 1899; I. luciae S,nevet, 1940; I. paranaensis Barros-Battesti, Arzua, Pichorim & Keirans, 2003; and I. schulzei AragA o pound & Fonseca, 1951. Further studies are needed to establish the taxonomic status of I. serrafreirei Amorim, Gazeta, Bossi & Linhares, 2003, a recently proposed species based solely on the nymphal stage. We present an up-to-date key to adults of the currently valid Brazilian species of Ixodes based on scanning electron microscopy. The relationships between Brazilian and other Neotropical Ixodes are also discussed.Fundacao de Amparo a Pesquisa do Estado de Sao Paulo - FAPESP[98/11666-8]Fundacao de Amparo a Pesquisa do Estado de Sao Paulo - FAPESP[99/05446-8]Conselho Nacional de Desenvolvimento Cientifico e Tecnologico - CNPqAcademic career scholarshipCAPE