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Alves Marta Elena Machado Martins Felippe Danyel Cardoso Bräunig Patrícia Pivoto Felipe Lamberti Sangioni Luís Antonio Vogel Fernanda Silveira Flores 《Parasitology research》2018,117(9):3033-3038
Parasitology Research - Cats and dogs are hosts of a large number of gastrointestinal parasites and can shed helminth eggs and protozoan oocysts in their feces. The close relationship between... 相似文献
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Vianna MC Horta MC Sangioni LA Cortez A Soares RM Mafra CL Galvão MA Labruna MB Gennari SM 《Revista do Instituto de Medicina Tropical de S?o Paulo》2008,50(5):297-301
The present study investigated the infection by spotted fever rickettsia in an endemic area for Brazilian spotted fever (BSF; caused by Rickettsia rickettsii) in Minas Gerais State, Brazil. Human, canine and equine sera samples, and Amblyomma cajennense adult ticks collected in a rural area of Itabira City, Minas Gerais State were tested for rickettsial infection. Through Immunofluorescence Assay (IFA) we demonstrated the presence of antibodies anti-R. rickettsii in 8.2%, 81.3% and 100% of the human, canine and equine sera, respectively. None of the 356 tick specimens analyzed were positive for Rickettsia by the hemolymph test or Polymerase Chain Reaction technique (PCR) for the htrA and the gltA genes. Our serological results on horses and dogs (sentinels for BSF) appoint for the circulation of a SFG Rickettsia in the study area, however in a very low infection rate among the A. cajennense tick population. 相似文献
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Ramos Fernanda Marques Camila Balconi Reginato Caroline Zamperete de Souza Rodrigues Fernando Sangioni Luis Antônio Vogel Fernanda Silveira Flôres Pötter Luciana 《Parasitology research》2018,117(12):3993-4002
Parasitology Research - The aim of the present study was to evaluate the effects of treatment with different anthelmintic compounds on the productivity of naturally infected calves and the economic... 相似文献
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Sangioni LA Horta MC Vianna MC Gennari SM Soares RM Galvão MA Schumaker TT Ferreira F Vidotto O Labruna MB 《Emerging infectious diseases》2005,11(2):265-270
We compared the rickettsial infection status of Amblyomma cajennense ticks, humans, dogs, and horses in both Brazilian spotted fever (BSF)-endemic and -nonendemic areas in the state of Sao Paulo, Brazil. Most of the horses and few dogs from BSF-endemic areas had serologic titers against Rickettsia rickettsii antigens. In contrast, no dogs or horses from BSF-nonendemic areas had serologic titers against R. rickettsii antigens, although they were continually exposed to A. cajennense ticks. All human serum samples and ticks from both areas were negative by serologic assay and polymerase chain reaction, respectively. Our results indicate that surveys of horse serum are a useful method of BSF surveillance in areas where humans are exposed to A. cajennense ticks. In addition, we successfully performed experimental infection of A. cajennense ticks with R. parkeri. 相似文献
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Brustolin Joice Magali da Silva Krawczak Felipe Alves Marta Elena Machado Weiller Maria Amélia de Souza Camila Lopes Rosa Fábio Brum Cadore Gustavo Cauduro dos Anjos Lopes Sônia Terezinha Labruna Marcelo Bahia Vogel Fernanda Silveira Flores de Avila Botton Sônia Sangioni Luís Antônio 《Parasitology research》2018,117(3):713-720
Parasitology Research - This study describes experimental infection of guinea pigs (Cavia porcellus) infested with naturally infected Amblyomma ovale nymphs with Rickettsia sp. (Atlantic rainforest... 相似文献
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Felipe Lamberti Pivoto Fabricio Amadori Machado Paulo Afonso Anezi-Junior Augusto Weber Alfredo Skrebsky Cezar Luis Antonio Sangioni Fernanda Silveira Flores Vogel 《Parasitology research》2014,113(6):2303-2310
The aim of this study was to compare the liveweight gain of lambs, infected by multidrug-resistant nematodes, treated by conventional schemes of helminth control or using a schedule based on fecal egg count reduction test (FECRT). The flock was selected after a FECRT (experiment 1) which revealed a parasite population resistant to benzimidazoles, imidazothiazoles, macrocyclic lactones (ivermectin), salicylanilides, nitrophenols, and organophosphates. Despite the parasite resistance to ivermectin (an avermectin), the moxidectin (a milbemycin) was effective against the gastrointestinal nematodes (PR?>?90 %). In experiment 2, 48 suckling lambs were distributed in four randomized blocks (G1, G2, G3, and G4) by previous body weighings. G1 was kept as untreated control; G2 was treated following a FECRT-based schedule with drugs chosen based on fecal analysis (first drench with moxidectin, second drench with a combination of moxidectin and levamisole, and third drench with praziquantel, an anti-cestode drug); G3 and G4 received three drenches with ivermectin or disophenol, respectively. Body weighings and fecal analysis of these lambs were performed every 2 weeks over a 98-day period. An effective control of gastrointestinal nematodes was obtained with two nematicidal drenches following the FECRT-based schedule of treatments. On the other hand, eggs per gram of feces (EPG) counts were no different among untreated control, G3, and G4. Lambs treated using the FECRT-based schedule had the greatest liveweight gain among the groups tested. Additionally, liveweight gain was no different among the groups G3, G4, and G1. The FECRT-based schedule of anthelmintic treatments was beneficial regarding productivity and sustainability of helminth control in lambs infected by multidrug-resistant nematodes. 相似文献
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Horta MC Labruna MB Sangioni LA Vianna MC Gennari SM Galvão MA Mafra CL Vidotto O Schumaker TT Walker DH 《The American journal of tropical medicine and hygiene》2004,71(1):93-97
In serum samples obtained from all the healthy humans, horses, dogs, and donkeys present on three farms in the Pedreira Municipality, an endemic area for Brazilian spotted fever, an indirect immunofluorescence assay (IFA) detected antibodies against Rickettsia rickettsii in 17 (77.3%) horses, 5 (31.3%) dogs (titers ranging from 64 to 4,048), and none of 4 donkeys or 50 humans. Five canine and eight equine sera with high antibody titers to R. rickettsii were also tested by IFA against R. bellii, R. akari, and R. africae antigens. Sera from two horses and two dogs that showed similar high antibody titers against two rickettsial antigens were evaluated after cross-absorption. Sera from seven horses and two dogs contained antibodies specific for R. rickettsii, and one dog serum had antibodies against a Rickettsia species very closely related to R. africae. The latter may have been caused by infection with the recently identified COOPERI strain. 相似文献
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