Surveys of horse serum are a useful method of surveillance for Brazilian spotted fever in areas where humans are exposed to Amblyomma cajennense ticks

Burgdorfer

Bustamante

Chomkzynski

Fernando Ferreira

Galvao

Gimémez

Goddard

Gonçalves

Hanson

Horta

Labruna

Lackman

Lemos

Lima

Luis A. Sangioni

Manoella C.B. Vianna

Marcelo B. Labruna

Maurício C. Horta

Márcio A.M. Galvão

Odilon Vidotto

Paddock

Patino-Camargo

Regnery

Rodaniche

Rodrigo M. Soares

Sexton

Solange M. Gennari

Teresinha T.S. Schumaker

Venzal

Webb

Emerging Infectious Diseases

English

PubMed

Crossref

Rickettsial Infection in Animals and Brazilian Spotted Fever Endemicity

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 São 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

Directory of Open Access Journals

A reagent for the single-step simultaneous isolation of RNA, DNA and proteins from cell and tissue samples.

Apropósito de quatro casos diagnosticados no Rio de Janeiro de febre amculosa barsileira. Folha Médica.

Brazilian spotted fever in Espirito Santo, Brazil: description of a focus of infection in a new endemic region. Am J Trop Med Hyg.

Brazilian spotted fever: description of a fatal clinical case in the State of Rio de Janeiro. Rev Soc Bras Med Trop.

Detection of murine typhus infection in fleas by using the polymerase chain reaction.

Ecological and epidemiological considerations of Rocky Mountain spotted fever and scrub typhus. In:

Ectoparasitos de importância veterinária. São Paulo: Editora Plêiade;

Epidemiological aspects of the Brazilian spotted fever: serological survey of dogs and horses in an endemic area in the state of São Paulo, Brazil. Rev Inst Med Trop de São Paulo.

Estudios de fiebre manchada en Mexico. Hallazgo del Amblyomma cajennense naturalmente infectado, en Veracruz. Rev Inst Salubr Enferm Trop.

Experimental infection of lone star ticks, Amblyomma americanum (L.), with Rickettsia parkeri and exposure of guinea pigs to the agent.

Febre maculosa em Minas Gerais: um estudo sobre a distribuição da doença no Estado e seu comportamento em área de foco peri-urbano [Doctoral thesis]. Belo Horizonte: Faculdade de Medicina da UFMG;

Febre maculosa no município de Pedreira, Estado de São Paulo, Brasil: Relação entre ocorrência de casos e parasitismo humano por ixodídeos. Rev Soc Bras Med Trop.

Genotypic identification of rickettsiae and estimation of intraspecies sequence divergence for portions of two rickettsial genes.

Natural infection of the tick Amblyomma cajennense with Rickettsia rickettsii in Panama. Am J Trop Med Hyg.

Nonpathogenic rickettsiae in Dermacentor andersoni: a limiting factor for the distribution of Rickettsia rickettsii.

Nuevas observaciones sobre un tercer foco de fiebre petequial (maculosa) en el hemisferio americano. Bol Oficina Sanit Panam.

Rickettsia species infecting Amblyomma cooperi ticks from an endemic area for Brazilian spotted fever in the state of São Paulo,

Rickettsioses emergentes e reemergentes numa região endêmica do estado de Minas Gerais, Brazil. Cad Saude Publica.

Risk factors to tick infestations and their occurrence on horses in the State of São Paulo, Brazil. Vet Parasitol.

Rocky Mountain spotted fever in an endemic area in Minas Gerais, Brazil. Mem Inst Oswaldo Cruz.

Seasonal dynamics of ticks (Acari: Ixodidae) on horses in the state of São Paulo, Brazil. Vet Parasitol.

Serological characteristics of a pathogenic rickettsia occuring in Amblyomma maculatum. Public Health Rep.

Situação da febre maculosa na região administrativa de Campinas, São Paulo, Brasil. Cad Saude Publica.

Some characteristics of heavy and light bands of Rickettsia prowazekii on Renografin gradients. Infect Immun.

Spotted fever in Brazil: a seroepidemiological study and description of clinical cases in an endemic area in the state of Sao Paulo. Am J Trop Med Hyg.

Spotted fever in Mexico. Memórias doInstituto Butantan.1946;19:159–80.

Spotted fever rickettsiosis in Coronel Fabriciano, Minas Gerais State. Rev Soc Bras Med Trop.

Rickettsial Infection in Animals and Brazilian Spotted Fever Endemicity

Abstract

Similar works

Full text

Available Versions

Crossref

Directory of Open Access Journals