73 documents found, page 1 of 8
Capybara (Hydrochoerus hydrochaeris) exposure to Rickettsia in the Federal Dist...
Quadros,Ana Paula Nunes de; Rêgo,George Magno Sousa do; Silva,Thamiris Figueiredo da; Carvalho,Andréa de Moraes; Martins,Thiago FernandesAbstract In this study, whole blood samples and ticks were collected from 57 capybaras in recreational areas in the Federal District, Brazil, aiming to investigate the presence of Rickettsia spp. using polymerase chain reaction (PCR) and indirect immunofluorescence (IFAT) assays. None of the capybara blood samples yielded rickettsial DNA by PCR. Among 55 capybara serum samples tested by IFAT, 53 (96.3%) reacted...
Endoparasites of capybaras (Hydrochoerus hydrochaeris) from anthropized and nat...
Souza,Silvio Luís Pereira de; Benatti,Hector Ribeiro; Luz,Hermes Ribeiro; Costa,Francisco Borges; Pacheco,Richard de Campos; Labruna,Marcelo BahiaAbstract This study aimed to evaluate the occurrence of endoparasites in fecal samples of capybaras from anthropized areas in seven cities in the state of São Paulo, southeastern Brazil, and natural areas in two locations in the Pantanal biome. For the parasitological evaluation of samples, feces were subjected to centrifugal sedimentation in water-ether and centrifugal flotation in sucrose solution. Out of the...
Reproductive control of capybaras through sterilization in areas at risk of tra...
Nunes,Fernanda Battistella Passos; Nunes,Alexandre Zanetti; Nunes,Mariana Passos; Labruna,Marcelo Bahia; Pizzutto,Cristiane SchilbachABSTRACT: Groups of capybaras (Hydrochoerus hydrochaeris) are currently frequent inhabitants of urban areas. The species participates in the transmission cycle of Brazilian spotted fever (BSF), a zoonosis that is caused by the bacteria R. rickettsii and transmitted by vector ticks. This has led to discussions on strategies to decrease the presence of this rodent through contraceptive methods and euthanasia, thu...
Implications of domestic dogs in the epidemiology of Rickettsia parkeri strain ...
Fournier,Gislene Fátima da Silva Rocha; Pinter,Adriano; Muñoz-Leal,Sebastian; Labruna,Marcelo Bahia; Lopes,Marcos Gomes; Martins,Thiago FernandesAbstract This study aimed to evaluate the occurrence of diseases transmitted by Amblyomma ovale in 61 dogs monitored for three years through collections of ticks and blood, interviews, telemetry and camera traps in three areas of Serra do Mar State Park, Brazil. Blood samples were used to investigate infection by Rangelia vitalii by real-time TaqMan PCR and Rickettsia parkeri by IIFA. The collected ticks were s...
Serological occurrence for tick-borne agents in beef cattle in the Brazilian Pa...
Ramos,Inalda Angélica de Souza; Mello,Victória Valente Califre de; Mendes,Natalia Serra; Zanatto,Diego Carlos de Souza; Campos,João Bosco VilelaAbstract This study investigated the seropositivity for five different tick-borne agents, namely Anaplasma marginale, Babesia bovis, Babesia bigemina, Coxiella burnetii, Anaplasma phagocytophilum, and Trypanosoma vivax in beef cattle in the Brazilian Pantanal. The serum samples collected from animals (200 cows; 200 calves) were used in indirect enzyme-linked immunosorbent assays (iELISA) to detect IgG antibodie...
Expression and antigenic analysis of the recombinant TRP36 protein from Ehrlich...
Medeiros,Miguel Ângelo da Silva; Silva,Maria Helena da; Matta,Maria Adelaide do Valle; Ferreira,Eliane de Oliveira; Machado,Sérgio LisboaAbstract Ehrlichia canis is the main etiological agent of canine monocytic ehrlichiosis (CME), a globally canine infectious disease. In Brazil, CME is considered to be endemic, and its prevalence can reach 65% in some states. The diagnosis of ehrlichiosis is important for treatment and epidemiological purposes. The E. canis TRP36 (Tandem Repeat Protein) protein elicits the earliest acute-phase antibody response...
Detection of tick-borne rickettsial pathogens in naturally infected dogs and do...
Arroyave,Esteban; Cornwell,Emily Rose; McBride,Jere Williams; Díaz,Carlos Arley; Labruna,Marcelo Bahia; Rodas,Juan DavidAbstract Tick-borne rickettsial pathogens (TBRP) are important causes of infections in both dogs and humans. Dogs play an important role as a biological host for several tick species and can serve as sentinels for rickettsial infections. Our aim was to determine the presence of TBRP in dogs and in dog-associated ticks and their potential risk to human diseases in Medellin, Colombia. DNA for E. canis (16S rRNA a...
The nonparasitic phase of Dermacentor nitens under field conditions in southeas...
Labruna,Marcelo Bahia; Faccini,João Luiz HorácioAbstract Dermacentor nitens is a one-host tick that uses domestic equids as main hosts. Herein, the nonparasitic phase of D. nitens was evaluated under field conditions in Pirassununga, São Paulo state, Southeastern Brazil. By exposing engorged females of D. nitens to field conditions (grass plots) for 24 consecutive months, this tick species was able to complete its nonparasitic phase by producing host-seeking...
Rickettsial infection in equids, opossums and ticks in the municipality of Mont...
Ueno,Tatiana Evelyn Hayama; Cutolo,André Antonio; Martins,Thiago Fernandes; Moraes-Filho,Jonas; Azevedo,Sérgio Santos de; Labruna,Marcelo BahiaAbstract The aim of this study was to investigate rickettsial infection in equids, opossums and ticks in the municipality of Monte Mor, a place where a Brazilian spotted fever case occurred in 2005. In addition, characteristics possibly associated with seropositivity in horses were analyzed. Serum samples from horses, mules and opossums (Didelphis albiventris) were subjected to indirect immunofluorescence assay...
Occurrence of Ehrlichia canis and Hepatozoon canis and probable exposure to Ric...
Lopes,Marcos Gomes; Krawczak,Felipe da Silva; Lima,Julia Teresa Ribeiro de; Fournier,Gislene Fatima da Silva Rocha; Acosta,Igor da Cunha LimaAbstract Occurrence of infection or exposure to Ehrlichia canis, Hepatozoon canis and Rickettsia spp. was detected in feral cats living in two fragments from Atlantic rainforest, in Natal, RN, Brazil, and in dogs living around the parks. While serum samples were collected from 155 animals (53 cats living in the parks; 29 dogs living in human homes around the parks; and 73 dogs living at an animal control center...