Orientador : Aricio Xavier Linhares / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia / Made available in DSpace on 2018-07-18T19:41:41Z (GMT). No. of bitstreams: 1 Komeno_CarlosAlbertoKiyoshi_M.pdf: 6389014 bytes, checksum: 63bbc801b9d0e0281cb32e6d9f6a5496 (MD5) Previous issue date: 1993 / Resumo: A associação de artrópodes ectoparasitas com morcegos Phyllostomidae foi avaliada na Reserva Ecológica do Panga (Uberlândia, MG). Durante o período de agosto de 1989 a julho de 1990, utilizando-se redes de neblina, foram realizadas 35 coletas noturnas. Foram obtidas 12 de espécies de Phyllostomidae, moscas representantes de 11 espécies de Streblidae, uma de Nycteribiidae e ácaros do gênero Periglischrus. O díptero Trichobius joblingi, parasitando Carollia perspicillata, apresentou preferência significativa pelas asas dos hospedeiros e por machos adultos. Esta preferência por machos pode ser devida à predominância deste sexo nas colônias e ao fato de fêmeas abrigarem-se isoladamente durante o período reprodutivo. Fatores ecológicos podem ser fundamentais na seleção do sexo ou estágio de desenvolvimento do hospedeiro pelo parasita. Os dípteros Aspidoptera falcata e Megistopoda próxima parasitaram Sturnira lilium. A primeira espécie apresentou preferência significativa por fêmeas de estágios jovem e adulto, enquanto que a segunda não apresentou preferência significativa por sexo ou estágio do hospedeiro. Houve distinção de habitat, com A. falcata localizando-se sobre as asas e M proxima entre a pelagem do corpo do hospedeiro. Ademais, ocorreu diferenciação sazonal para as duas espécies, que pode ser devida à competição inter-específica. De modo geral, a sazonalidade dos ectoparasitas está relacionada a do hospedeiro, não apresentando diferença significativa entre a estação seca e a chuvosa / Abstract: In order to study the association between ectoparasitc arthropods and phyllostomid bats, 35 nightly collections of bats and their ectoparasites were made using mist nets, at the "Reserva Ecologica do Panga" (Uberlandia, MG), from August 1989 to July 1990. Twelve species of bats, 11 of Streblidae, 1 of Nycteribiidae and mites of the genus Periglischrus were collected. The fly Trichobius joblingi was found on Carollia perspicillata, showing preference for the wing membranes of adult male hosts. This preference for males could be explained by the predominance of this sex in colonies, and by the fact that females rest in isolation during the reproductive period. Hence, it was concluded that ecological factors are of importance in determining the preference of the parasit for sex and stage of development of the host. The flies Aspidopotera falcata and Megitopoda proxima were found on Sturnira lilium. The first parasite species showed preference for young and adult females, whereas M proxima did not show any preference in relation to sex and developmental stage of the host. However, A. falcata was found mostly on the wings and M proxima preferred the body of the host. In addition, there was a seasonal differentiation between the two Streblidae species. These differences can be explained by inter specific competition. In general, ectoparasites seasonality did not show any difference between dry and wet seasons, leading to the conclusion that it is related to the seasonality of the hosts / Mestrado / Parasitologia / Mestre em Ciências Biológicas

The burden of ticks in semi-arid lands of Ethiopia is not as pronounced as in some more humid areas of the continent. Nevertheless, the increasing recourse to chemicals smuggled by illegal traders has led to serious problems, including poisoning of humans and animals, discontinuous and irrational treatment regimens, tick-resistance to acaricidal products, loss of traditional knowledge and weakening of social structures. In order to encourage a resumption of the long-established ethnoveterinary practices, a survey on plants locally used in tick control was undertaken, and plant species used in other parts of the continent for the same purpose were considered. On these bases, 28 plant species or varieties were collected in the study area: Acacia seyal var. seyal, Adenium somalense, Aloe calidophila, Aloe parvidens, Azadirachta indica, Boscia angustifolia, Calotropis procera, Calpurnia aurea, Cissus quadrangularis, Commiphora erythraea, Cordia africana, Croton macrostachys, Croton megalocarpus, Datura stramonium, Euphorbia candelabrum, Euphorbia tirucalli, Ficus sycomorus, Ficus thonningii, Lantana camara, Maerua triphylla, Ocimum suave, two varieties of Ricinus communis (one with green fruits and another with red ones), Solanum incanum, Solanum somalense, Sterculia rhynchocarpa, Tagetes minuta and Vernonia amygdalina. In general, leaves were collected and used. However, due to the scarcity of foliar material, the whole plant of T. minuta and O. suave, the whole stem of A. somalense and C. quadrangularis, the branches of E. candelabrum and E. tirucalli, the bark in the case of A. seyal, C. erythraea and S. rhynchocarpa, were examined. After drying and grinding, the plant material was extracted with hexane and acetone, and made up to different concentrations to test the relevant repellent and toxic properties on adult Rhipicephalus pulchellus unfed ticks. For every bioassay, four replications, each using ten ticks, were performed. For the repellency bioassays, ticks were placed on a rectangular polystyrene platform stuck in a plastic basin and surrounded by water, in order to prevent them from moving away. Two glass rods, each provided with filter paper at the top and at the base, were inserted at opposite edges of the platform. The two filter papers of one rod were impregnated with the testing solution (i.e. solvent plus extract) at different concentrations while those of the other rod were treated with the pertinent extractant (hexane or acetone). Because of their inherent tendency to climb, most of the ticks settled onto the rods (mainly at the top), and their distribution was different depending on the repellency capacity of the extracts. The relevant data were then converted into repellency indexes using the formula [(Nc - Nt)/(Nc + Nt)] x 100, where Nc refers to the number of ticks on the control rod and Nt to the number of ticks on the test rod (Lwande et al., 1999; Pascual-Villalobos and Robledo, 1998). For the toxicity bioassays, 1 ìl of the extract at different concentrations was placed onto each tick and the mortality or weakening ratio was recorded after 24 hours. Because of the intrinsic toxicity of hexane, only acetone extracts were used for these assays. Due to the efficacy in extracting volatile compounds, hexane extracts had, for 24 plant species, better repellent properties than acetone extracts. Moreover, at a concentration of 10%, four species had negative repellency indexes with hexane extracts and five with acetone ones. At such concentration, these extracts therefore seemed to attract the ticks rather than repel them. At a concentration of 10%, thirteen hexane and five acetone extracts had repellency indexes > 50. At a concentration of 5%, only five hexane extracts and no acetone ones exceeded this value. Finally, only one species had a repellency index > 50 with the hexane extract at a 1% concentration. The plants showing good repellency indexes with at least one of the two solvents were A. calidophila, C. quadrangularis, C. erythraea, C. macrostachys, C. megalocarpus, D. stramonium, L. camara, M. triphylla, O. suave, the two varieties of R. communis and T. minuta. Amomg them, from a practical point of view, it is suitable to concentrate on O. suave, T. minuta and, to a certain extent, A. calidophila. In fact, C. quadrangularis, C. erythraea, C. macrostachys, D. stramonium, M. triphylla and the two varieties of R. communis had good repellent properties using hexane extracts at 10%, but not at 5%. Because trees like C. erythraea, C. macrostachys, C. megalocarpus and M. triphylla are highly valuable in a very dry environment, an excessive exploitation can put them in danger. Since D. stramonium, L. camara and R. communis are toxic plants, their extracts can be a serious threat for both humans and animals. Furthermore, L. camara is one of the worst weeds in the world, making it very inappropriate for lands already subject to the problem of bush encroachment. For all these reasons, T. minuta and O. suave appear to be the most promising plants; moreover, they are very well known in Southern Ethiopia and occur widely all over the area. On the contrary, A. calidophila is limited to just some places and the cultivation of Aloe species needs special attention, so it is not very suitable for people with a nomadic lifestyle. Concerning the toxicity bioassays, C. aurea extracts yielded by far the best results. In fact, all the ticks used had severe movement impairment when put in contact with acetone extracts at the concentrations of 20% and 10%. At a 5% concentration, 85% of the ticks had the same symptoms. In a separate test, a 10% water extract had a similar effect on 30 ticks out of 40, demonstrating the ease of extraction and application of the active compounds. The plant is well known, mainly by the Borana pastoralists, and is resistant to drought. It is also well able to grow in overgrazed areas, and its cultivation does not require special skills. Some of the extracts of other species gave good or fair results in the toxicity bioassays but, apart from S. incanum, only at a very high concentration (20%). Further studies may include isolation and characterization of the active compounds from the best species, setting up of a suitable plan for livestock treatment, and organization of a production and distribution cycle of appropriate phytomedicines in the pertinent pastoral area. / Dissertation (MSc (Veterinary Science))--University of Pretoria, 2007. / Paraclinical Sciences / unrestricted

O objetivo deste trabalho foi avaliar a condição corporal e a presença e identificação de ectoparasitos em carnívoros silvestres, com ênfase em Lycalopex gymnocercus (graxaim-docampo) e Cerdocyon thous (graxaim-do-mato), em uma região ambientalmente afetada pela construção da Usina Hidrelétrica de Barra Grande. Foram realizadas campanhas sazonais para cada uma das quatro áreas de estudo, localizadas na região da fronteira entre o Rio Grande do Sul e Santa Catarina (sul do Brasil), em municípios banhados pelo Rio Pelotas. Os animais foram capturados através da utilização de armadilhas do tipo Tomahawk para mamíferos de médio porte; cada animal capturado foi sedado e teve sua condição corporal avaliada, ectoparasitos removidos, quando presentes, e fixados em álcool 70%. Grande parte dos animais capturados apresentava carrapatos do gênero Amblyomma, mas também se encontraram piolhos da ordem Phthiraptera e larvas de Dermatobia hominis. Encontrou-se uma variação sazonal estatisticamente significativa para a condição corporal dos animais capturados em todas as áreas de estudo e especialmente para L. gymnocercus. Encontrou-se uma correlação significativa entre condição corporal e presença de ectoparasitas para L. gymnocercus e para C. thous. / The aim of this study was to evaluate the body condition and ectoparasites prensence in species of wild carnivores, with emphasis on pampas-fox (Lycalopex gymnocercus) and crab-eating-fox (Cerdocyon thous) in an area environmentally affected by the construction of the Barra Grande hydroelectric power plant. Seasonal field works have been made for each of the four study areas located along the border between Rio Grande do Sul state and Santa Catarina state (southern Brazil), in counties bordering Pelotas river. Animals were captured using Tomahawlk traps for medium-sized mammals. All animals caught were sedated and had their body condition assessed, ectoparasites removed, if any, and fixed in 70% alcohol. Most of the animals trapped had Amblyomma spp. ticks, but we also found lice from the order Phthiraptera and larvae of Dermatobia hominis. We found a statistically significant seasonal variation in body condition of animals caught in all study areas and especially for L. gymnocercus. We found a significant correlation between body condition and ectoparasite presence for L. gymnocercus and C. thous.

O objetivo deste trabalho foi avaliar a condição corporal e a presença e identificação de ectoparasitos em carnívoros silvestres, com ênfase em Lycalopex gymnocercus (graxaim-docampo) e Cerdocyon thous (graxaim-do-mato), em uma região ambientalmente afetada pela construção da Usina Hidrelétrica de Barra Grande. Foram realizadas campanhas sazonais para cada uma das quatro áreas de estudo, localizadas na região da fronteira entre o Rio Grande do Sul e Santa Catarina (sul do Brasil), em municípios banhados pelo Rio Pelotas. Os animais foram capturados através da utilização de armadilhas do tipo Tomahawk para mamíferos de médio porte; cada animal capturado foi sedado e teve sua condição corporal avaliada, ectoparasitos removidos, quando presentes, e fixados em álcool 70%. Grande parte dos animais capturados apresentava carrapatos do gênero Amblyomma, mas também se encontraram piolhos da ordem Phthiraptera e larvas de Dermatobia hominis. Encontrou-se uma variação sazonal estatisticamente significativa para a condição corporal dos animais capturados em todas as áreas de estudo e especialmente para L. gymnocercus. Encontrou-se uma correlação significativa entre condição corporal e presença de ectoparasitas para L. gymnocercus e para C. thous. / The aim of this study was to evaluate the body condition and ectoparasites prensence in species of wild carnivores, with emphasis on pampas-fox (Lycalopex gymnocercus) and crab-eating-fox (Cerdocyon thous) in an area environmentally affected by the construction of the Barra Grande hydroelectric power plant. Seasonal field works have been made for each of the four study areas located along the border between Rio Grande do Sul state and Santa Catarina state (southern Brazil), in counties bordering Pelotas river. Animals were captured using Tomahawlk traps for medium-sized mammals. All animals caught were sedated and had their body condition assessed, ectoparasites removed, if any, and fixed in 70% alcohol. Most of the animals trapped had Amblyomma spp. ticks, but we also found lice from the order Phthiraptera and larvae of Dermatobia hominis. We found a statistically significant seasonal variation in body condition of animals caught in all study areas and especially for L. gymnocercus. We found a significant correlation between body condition and ectoparasite presence for L. gymnocercus and C. thous.

O objetivo deste trabalho foi avaliar a condição corporal e a presença e identificação de ectoparasitos em carnívoros silvestres, com ênfase em Lycalopex gymnocercus (graxaim-docampo) e Cerdocyon thous (graxaim-do-mato), em uma região ambientalmente afetada pela construção da Usina Hidrelétrica de Barra Grande. Foram realizadas campanhas sazonais para cada uma das quatro áreas de estudo, localizadas na região da fronteira entre o Rio Grande do Sul e Santa Catarina (sul do Brasil), em municípios banhados pelo Rio Pelotas. Os animais foram capturados através da utilização de armadilhas do tipo Tomahawk para mamíferos de médio porte; cada animal capturado foi sedado e teve sua condição corporal avaliada, ectoparasitos removidos, quando presentes, e fixados em álcool 70%. Grande parte dos animais capturados apresentava carrapatos do gênero Amblyomma, mas também se encontraram piolhos da ordem Phthiraptera e larvas de Dermatobia hominis. Encontrou-se uma variação sazonal estatisticamente significativa para a condição corporal dos animais capturados em todas as áreas de estudo e especialmente para L. gymnocercus. Encontrou-se uma correlação significativa entre condição corporal e presença de ectoparasitas para L. gymnocercus e para C. thous. / The aim of this study was to evaluate the body condition and ectoparasites prensence in species of wild carnivores, with emphasis on pampas-fox (Lycalopex gymnocercus) and crab-eating-fox (Cerdocyon thous) in an area environmentally affected by the construction of the Barra Grande hydroelectric power plant. Seasonal field works have been made for each of the four study areas located along the border between Rio Grande do Sul state and Santa Catarina state (southern Brazil), in counties bordering Pelotas river. Animals were captured using Tomahawlk traps for medium-sized mammals. All animals caught were sedated and had their body condition assessed, ectoparasites removed, if any, and fixed in 70% alcohol. Most of the animals trapped had Amblyomma spp. ticks, but we also found lice from the order Phthiraptera and larvae of Dermatobia hominis. We found a statistically significant seasonal variation in body condition of animals caught in all study areas and especially for L. gymnocercus. We found a significant correlation between body condition and ectoparasite presence for L. gymnocercus and C. thous.

Com o objetivo de estudar a fauna parasitária de Cerdocyon thous e Pseudalopex gymnocercus foram estimadas a prevalência, a intensidade média de infecção e abundância de helmintos gastrintestinais e artrópodes nesses hospedeiros. Foram capturados 40 canídeos silvestres na Região Sul do Estado do Rio Grande do Sul, nos municípios de Pedro Osório e Pelotas. Os animais foram capturados usando-se armadilha tipo Live Trap. Logo após a captura, os animais eram sedados, momento em que se coletava sangue e buscava-se coletar artrópodes ectoparasitos mediante exame minucioso. Em seguida os animais eram transportados para o Laboratório de Parasitologia do Departamento de Microbiologia e Parasitologia do Instituto de Biologia da UFPel, onde eram sacrificados usando-se pentobarbital sódico. Após a necropsia, os compartimentos do trato digestório, respiratório e renal foram isolados e examinados na busca de parasitos. O crânio dos animais foi usado para identificação taxonômica dos canídeos, dos quais 45% eram C. thous e 55% P. gymnocercus, podendo-se inferir que ambos canídeos são encontrados habitando a região fisiográfica desse trabalho. A totalidade dos animais (100%) apresentou-se parasitado. Amblyomma aureolatum é o carrapato com maior prevalência em P. gymnocercus (23,7%) e C. thous (61,11%) na região sul do Rio Grande do Sul. Nos nematódeos, os parasitos mais freqüentes foram: Ancylostoma caninum (C. thous 22,22%e P. gymnocercus 45,45%), Molineus felineus (C. thous 5,56% e P. gymnocercus 9,90%), Strongyloides spp. (C. thous 16,67% e P. gymnocercus 22,73%), Trichuris spp (C. thous 11,11% e P. gymnocercus 13,64%), e Capillaria hepática (C. thous 5,56% e P. gymnocercus 13,64%). Nos trematódeos, os parasitos encontrados foram: Alaria alata (C. thous 50,00% e P. gymnocercus 36,36%) e Athesmia heterolecithodes (C. thous 5,56%). Nos cestódeos, os parasitos encontrados foram: Spirometra spp (C. thous 61,11% e P. gymnocercus 54,55%) e Diphillobotriidae (C. thous 77,78% e P. gymnocercus 81,82%). Nos Acanthocephala os parasitos encontrados foram: Centrorhynchus sp. (C. thous 5,56%). Nos protozoários, os 7 parasitos encontrados foram: Babesia spp (P. gymnocercus 13,64%), diagnosticada por exame direto. / With the objective of studying parasitic fauna of Cerdocyon thous and Pseudalopex gymnocercus the prevalence, mean intensity of infection and abundance of gastrintestinal helminths and arthropods were observed in those hosts. 40 wild canids were captured in the South Area of the State of Rio Grande do Sul, in the counties of Pedro Osório and Pelotas. The animals were captured being used trap type “Live Trap”. Therefore after the capture, the animals were anesthesied and in that moment, the blood was collected and the presence or not of ectoparasites was observed. Therefore the animals were transported for the Laboratory of Parasitology, Department of Microbiology and Parasitology, Institute of Biology, UFPel, where they were sacrificed being used sodic pentobarbitol. After this, the portions of the intestinal and respiratory tract and kidney were isolated and examined in the search of parasites. The skull of the animals was used for the taxonomic identification of the hosts. C. thous (45%) and P. gymnocercus (55%) where observed. All hosts (100%) were parazited by some parasite type. Two species of Amblyomma were identified: A. aureolatum and A. tigrinum. Among the nematoda, the most frequent parasites were: Ancylostoma caninum (C. thous 22,22%e P. gymnocercus 45,45%), Molineus felineus (C. thous 5,56% e P. gymnocercus 9,90%), Strongyloides spp. (C. thous 16,67% e P. gymnocercus 22,73%), Trichuris spp (C. thous 11,11% and P. gymnocercus 13,64%), and Capillaria hepática (C. thous 5,56% and P. gymnocercus 13,64%). Among the trematoda, were found Alaria alata (C. thous 50,00% and P. gymnocercus 36,36%) and Athesmia heterolecithodes (C. thous 5,56%). Among the cestoda, the found parasites were: Spirometra spp. and Diphillobotriidae. Acanthocephala the found parasites were: Centrorhynchus sp. and among the protozoa, the found parasites were: Babesia spp (P. gymnocercus 13,64%), diagnosed by direct exam.

Com o objetivo de estudar a fauna parasitária de Cerdocyon thous e Pseudalopex gymnocercus foram estimadas a prevalência, a intensidade média de infecção e abundância de helmintos gastrintestinais e artrópodes nesses hospedeiros. Foram capturados 40 canídeos silvestres na Região Sul do Estado do Rio Grande do Sul, nos municípios de Pedro Osório e Pelotas. Os animais foram capturados usando-se armadilha tipo Live Trap. Logo após a captura, os animais eram sedados, momento em que se coletava sangue e buscava-se coletar artrópodes ectoparasitos mediante exame minucioso. Em seguida os animais eram transportados para o Laboratório de Parasitologia do Departamento de Microbiologia e Parasitologia do Instituto de Biologia da UFPel, onde eram sacrificados usando-se pentobarbital sódico. Após a necropsia, os compartimentos do trato digestório, respiratório e renal foram isolados e examinados na busca de parasitos. O crânio dos animais foi usado para identificação taxonômica dos canídeos, dos quais 45% eram C. thous e 55% P. gymnocercus, podendo-se inferir que ambos canídeos são encontrados habitando a região fisiográfica desse trabalho. A totalidade dos animais (100%) apresentou-se parasitado. Amblyomma aureolatum é o carrapato com maior prevalência em P. gymnocercus (23,7%) e C. thous (61,11%) na região sul do Rio Grande do Sul. Nos nematódeos, os parasitos mais freqüentes foram: Ancylostoma caninum (C. thous 22,22%e P. gymnocercus 45,45%), Molineus felineus (C. thous 5,56% e P. gymnocercus 9,90%), Strongyloides spp. (C. thous 16,67% e P. gymnocercus 22,73%), Trichuris spp (C. thous 11,11% e P. gymnocercus 13,64%), e Capillaria hepática (C. thous 5,56% e P. gymnocercus 13,64%). Nos trematódeos, os parasitos encontrados foram: Alaria alata (C. thous 50,00% e P. gymnocercus 36,36%) e Athesmia heterolecithodes (C. thous 5,56%). Nos cestódeos, os parasitos encontrados foram: Spirometra spp (C. thous 61,11% e P. gymnocercus 54,55%) e Diphillobotriidae (C. thous 77,78% e P. gymnocercus 81,82%). Nos Acanthocephala os parasitos encontrados foram: Centrorhynchus sp. (C. thous 5,56%). Nos protozoários, os 7 parasitos encontrados foram: Babesia spp (P. gymnocercus 13,64%), diagnosticada por exame direto. / With the objective of studying parasitic fauna of Cerdocyon thous and Pseudalopex gymnocercus the prevalence, mean intensity of infection and abundance of gastrintestinal helminths and arthropods were observed in those hosts. 40 wild canids were captured in the South Area of the State of Rio Grande do Sul, in the counties of Pedro Osório and Pelotas. The animals were captured being used trap type “Live Trap”. Therefore after the capture, the animals were anesthesied and in that moment, the blood was collected and the presence or not of ectoparasites was observed. Therefore the animals were transported for the Laboratory of Parasitology, Department of Microbiology and Parasitology, Institute of Biology, UFPel, where they were sacrificed being used sodic pentobarbitol. After this, the portions of the intestinal and respiratory tract and kidney were isolated and examined in the search of parasites. The skull of the animals was used for the taxonomic identification of the hosts. C. thous (45%) and P. gymnocercus (55%) where observed. All hosts (100%) were parazited by some parasite type. Two species of Amblyomma were identified: A. aureolatum and A. tigrinum. Among the nematoda, the most frequent parasites were: Ancylostoma caninum (C. thous 22,22%e P. gymnocercus 45,45%), Molineus felineus (C. thous 5,56% e P. gymnocercus 9,90%), Strongyloides spp. (C. thous 16,67% e P. gymnocercus 22,73%), Trichuris spp (C. thous 11,11% and P. gymnocercus 13,64%), and Capillaria hepática (C. thous 5,56% and P. gymnocercus 13,64%). Among the trematoda, were found Alaria alata (C. thous 50,00% and P. gymnocercus 36,36%) and Athesmia heterolecithodes (C. thous 5,56%). Among the cestoda, the found parasites were: Spirometra spp. and Diphillobotriidae. Acanthocephala the found parasites were: Centrorhynchus sp. and among the protozoa, the found parasites were: Babesia spp (P. gymnocercus 13,64%), diagnosed by direct exam.

Com o objetivo de estudar a fauna parasitária de Cerdocyon thous e Pseudalopex gymnocercus foram estimadas a prevalência, a intensidade média de infecção e abundância de helmintos gastrintestinais e artrópodes nesses hospedeiros. Foram capturados 40 canídeos silvestres na Região Sul do Estado do Rio Grande do Sul, nos municípios de Pedro Osório e Pelotas. Os animais foram capturados usando-se armadilha tipo Live Trap. Logo após a captura, os animais eram sedados, momento em que se coletava sangue e buscava-se coletar artrópodes ectoparasitos mediante exame minucioso. Em seguida os animais eram transportados para o Laboratório de Parasitologia do Departamento de Microbiologia e Parasitologia do Instituto de Biologia da UFPel, onde eram sacrificados usando-se pentobarbital sódico. Após a necropsia, os compartimentos do trato digestório, respiratório e renal foram isolados e examinados na busca de parasitos. O crânio dos animais foi usado para identificação taxonômica dos canídeos, dos quais 45% eram C. thous e 55% P. gymnocercus, podendo-se inferir que ambos canídeos são encontrados habitando a região fisiográfica desse trabalho. A totalidade dos animais (100%) apresentou-se parasitado. Amblyomma aureolatum é o carrapato com maior prevalência em P. gymnocercus (23,7%) e C. thous (61,11%) na região sul do Rio Grande do Sul. Nos nematódeos, os parasitos mais freqüentes foram: Ancylostoma caninum (C. thous 22,22%e P. gymnocercus 45,45%), Molineus felineus (C. thous 5,56% e P. gymnocercus 9,90%), Strongyloides spp. (C. thous 16,67% e P. gymnocercus 22,73%), Trichuris spp (C. thous 11,11% e P. gymnocercus 13,64%), e Capillaria hepática (C. thous 5,56% e P. gymnocercus 13,64%). Nos trematódeos, os parasitos encontrados foram: Alaria alata (C. thous 50,00% e P. gymnocercus 36,36%) e Athesmia heterolecithodes (C. thous 5,56%). Nos cestódeos, os parasitos encontrados foram: Spirometra spp (C. thous 61,11% e P. gymnocercus 54,55%) e Diphillobotriidae (C. thous 77,78% e P. gymnocercus 81,82%). Nos Acanthocephala os parasitos encontrados foram: Centrorhynchus sp. (C. thous 5,56%). Nos protozoários, os 7 parasitos encontrados foram: Babesia spp (P. gymnocercus 13,64%), diagnosticada por exame direto. / With the objective of studying parasitic fauna of Cerdocyon thous and Pseudalopex gymnocercus the prevalence, mean intensity of infection and abundance of gastrintestinal helminths and arthropods were observed in those hosts. 40 wild canids were captured in the South Area of the State of Rio Grande do Sul, in the counties of Pedro Osório and Pelotas. The animals were captured being used trap type “Live Trap”. Therefore after the capture, the animals were anesthesied and in that moment, the blood was collected and the presence or not of ectoparasites was observed. Therefore the animals were transported for the Laboratory of Parasitology, Department of Microbiology and Parasitology, Institute of Biology, UFPel, where they were sacrificed being used sodic pentobarbitol. After this, the portions of the intestinal and respiratory tract and kidney were isolated and examined in the search of parasites. The skull of the animals was used for the taxonomic identification of the hosts. C. thous (45%) and P. gymnocercus (55%) where observed. All hosts (100%) were parazited by some parasite type. Two species of Amblyomma were identified: A. aureolatum and A. tigrinum. Among the nematoda, the most frequent parasites were: Ancylostoma caninum (C. thous 22,22%e P. gymnocercus 45,45%), Molineus felineus (C. thous 5,56% e P. gymnocercus 9,90%), Strongyloides spp. (C. thous 16,67% e P. gymnocercus 22,73%), Trichuris spp (C. thous 11,11% and P. gymnocercus 13,64%), and Capillaria hepática (C. thous 5,56% and P. gymnocercus 13,64%). Among the trematoda, were found Alaria alata (C. thous 50,00% and P. gymnocercus 36,36%) and Athesmia heterolecithodes (C. thous 5,56%). Among the cestoda, the found parasites were: Spirometra spp. and Diphillobotriidae. Acanthocephala the found parasites were: Centrorhynchus sp. and among the protozoa, the found parasites were: Babesia spp (P. gymnocercus 13,64%), diagnosed by direct exam.