RESUMO
La enfermedad por arañazo de gato (EAG) es producida por Bartonella henselae.Afecta principalmente a ninos y el reservorio es el gato doméstico. El diagnóstico de laboratorio se basa en la detección de anticuerpos por inmunofluorescencia indirecta (IFI). El objetivo de este trabajo fue analizar la evidencia serológica de infección por B. henselae en pacientes pediátricos que reunían criterios clínicos/epidemiológicos para la sospecha de EAG. Se estudió a 92 pacientes; de acuerdo con los resultados serológicos, estos fueron categorizados en 4 grupos: 1) IgG (+)/IgM (+), 31,5% (n = 29);2) IgG (-)/IgM (+), 10,9% (n = 10);3) IgG (+)/IgM (-), 9,8% (n = 9), y 4) IgG (-)/IgM (-), 47,8% (n = 44). La divulgación de estos resultados intenta promover futuros trabajos que investiguen la seroprevalencia de Bartonella spp. en Argentina. Esto permitirá conocer la importancia de esta zoonosis en nuestra población y evaluar nuevos puntos de corte para esta técnica serológica.
Cat scratch disease (CSD) is caused by Bartonella henselae, which mainly affects children. The cat is the reservoir. The laboratory diagnosis is based on the detection of antibodies by the Indirect Immunofluorescence (IFI) assay. The objective of this study was to analyze the serological evidence of B. henselae infection in pediatric patients that met the clini-cal/epidemiological criteria for suspected CSD. We studied 92 patients, who were categorized into four serological groups: 1) IgG (+)/IgM(+), 31,5% (n = 29); 2) IgG (-)/IgM(+), 10,9% (n = 10); 3) IgG (+)/IgM(-), 9,8% (n = 9); 4) IgG (-)/IgM(-), 47,8% (n = 44). These findings aim to promote future works for investigating the seroprevalence of Bartonella spp. in Argentina, which will allow us to know the importance of this zoonosis in our population and to evaluate new cut-off points of the technique.
Assuntos
Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Doença da Arranhadura de Gato/sangue , Doença da Arranhadura de Gato/diagnóstico , Bartonella henselae/imunologia , Anticorpos Antibacterianos/sangue , Testes Sorológicos , Estudos RetrospectivosRESUMO
Cat scratch disease (CSD) is caused by Bartonella henselae, which mainly affects children. The cat is the reservoir. The laboratory diagnosis is based on the detection of antibodies by the Indirect Immunofluorescence (IFI) assay. The objective of this study was to analyze the serological evidence of B. henselae infection in pediatric patients that met the clinical/epidemiological criteria for suspected CSD. We studied 92 patients, who were categorized into four serological groups: 1) IgG (+)/IgM(+), 31,5% (n=29); 2) IgG (-)/IgM(+), 10,9% (n=10); 3) IgG (+)/IgM(-), 9,8% (n=9); 4) IgG (-)/IgM(-), 47,8% (n=44). These findings aim to promote future works for investigating the seroprevalence of Bartonella spp. in Argentina, which will allow us to know the importance of this zoonosis in our population and to evaluate new cut-off points of the technique.
Assuntos
Anticorpos Antibacterianos/sangue , Bartonella henselae/imunologia , Doença da Arranhadura de Gato/sangue , Doença da Arranhadura de Gato/diagnóstico , Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Estudos Retrospectivos , Testes SorológicosRESUMO
In order to determine the frequency of seropositive cases of Bartonella henselae in children with regional adenitis treated in a national hospital in Peru, a cross-sectional study was conducted in 106 children with regional adenitis greater than 1 cm in diameter. The sample was selected from patients aged 5-11 years seen at the National Institute of Child Health for acute onset of regional adentitis, with more than five days of symptoms. B. henselae seropositivity was defined by indirect immunofluorescence test. We found that 86 children (81.1%) were positive for B.henselae. The median age of the patients was 7 years. In the bivariate analysis, the following associated factors were found: aged 5 years, history of fever, lymphadenopathy greater than 4 cm and reported contact with cat. In conclusion, children with regional adenitis treated in this national referral hospital showed a high frequency of positive serology for B. henselae.
Assuntos
Bartonella henselae , Doença da Arranhadura de Gato/epidemiologia , Linfadenite/epidemiologia , Linfadenite/microbiologia , Anticorpos Antibacterianos/sangue , Bartonella henselae/imunologia , Doença da Arranhadura de Gato/sangue , Criança , Pré-Escolar , Estudos Transversais , Feminino , Hospitais , Humanos , Linfadenite/sangue , Masculino , Peru , Estudos SoroepidemiológicosRESUMO
Con el objetivo de determinar la frecuencia de casos seropositivos a Bartonella henselae en niños con adenitis regional atendidos en un hospital nacional del Perú, se realizó un estudio trasversal en 106 niños con adenitis regional mayor de 1 cm de diámetro, de aparición aguda, con tiempo de enfermedad mayor de cinco días, atendidos en el Instituto Nacional de Salud del Niño durante el año 2012. Se definió seropositividad para B. henselae mediante el examen de inmunofluorescencia indirecta, siendo positivos 86 niños (81,1%) con una mediana de edad de 7 años, rango de 5 a 11; en el análisis bivariado se encontraron como factores asociados, edad mayor de 5 años, antecedentes de fiebre, adenopatía mayor de 4 cm y reporte de contacto con gato. En conclusión, los niños con adenitis regional atendidos en este hospital de referencia nacional presentaron una frecuencia alta de serología positiva para B. henselae.
In order to determine the frequency of seropositive cases of Bartonella henselae in children with regional adenitis treated in a national hospital in Peru, a cross-sectional study was conducted in 106 children with regional adenitis greater than 1 cm in diameter. The sample was selected from patients aged 5-11 years seen at the National Institute of Child Health for acute onset of regional adentitis, with more than five days of symptoms. B. henselae seropositivity was defined by indirect immunofluorescence test. We found that 86 children (81.1%) were positive for B.henselae. The median age of the patients was 7 years. In the bivariate analysis, the following associated factors were found: aged 5 years, history of fever, lymphadenopathy greater than 4 cm and reported contact with cat. In conclusion, children with regional adenitis treated in this national referral hospital showed a high frequency of positive serology for B. henselae.
Assuntos
Humanos , Masculino , Feminino , Pré-Escolar , Criança , Bartonella henselae , Doença da Arranhadura de Gato/epidemiologia , Linfadenite/epidemiologia , Linfadenite/microbiologia , Anticorpos Antibacterianos/sangue , Bartonella henselae/imunologia , Doença da Arranhadura de Gato/sangue , Estudos Transversais , Hospitais , Linfadenite/sangue , Peru , Estudos SoroepidemiológicosRESUMO
The diagnosis of infective endocarditis can be difficult, particularly with atypical presentation and negative blood cultures. A 61-year-old man with a porcine aortic valve presented with fever, intermittent confusion, diarrhea, and fatigue. In the community clinic setting, a colonoscopy performed for anemia demonstrated colitis. Symptoms progressed for months; elicitation of a history of significant kitten exposure and the finding of an axillary lymph node prompted testing for Bartonella henselae antibodies. High titer antibodies by indirect immunofluorescence assay indicated chronic B. henselae infection. Surgical valve replacement followed by prolonged doxycycline and rifampin led to cure. This case illustrates the complexities of infective endocarditis and is the first description B. henselae endocarditis associated with colitis in an immunocompetent adult.
Assuntos
Bartonella henselae , Doença da Arranhadura de Gato/complicações , Doença da Arranhadura de Gato/diagnóstico , Colite/microbiologia , Endocardite Bacteriana/complicações , Próteses Valvulares Cardíacas/microbiologia , Animais , Antibacterianos/uso terapêutico , Anticorpos Antibacterianos/sangue , Bartonella henselae/imunologia , Bartonella henselae/isolamento & purificação , Doença da Arranhadura de Gato/sangue , Gatos , Endocardite Bacteriana/tratamento farmacológico , Humanos , Masculino , México , Pessoa de Meia-Idade , Resultado do Tratamento , Ferimentos e Lesões/microbiologiaRESUMO
BACKGROUND: Cat-scratch disease is common among children. Among adults the disease is less often considered in the differential diagnosis of enlarged lymph nodes and fever. AIM: To report the clinical and laboratory features of eight patients with cat-scratch disease. MATERIAL AND METHODS: Review of the medical records of eight patients (aged 22 to 57 years, six males) with a serological diagnosis of cat-scratch disease (an IgG titer over 1:256, by immunofluorescence). RESULTS: Only five patients recalled having had contact with cats. Seven had fever and weight loss. Six had excessive sweating and five had chills. Seven had painfully enlarged lymph nodes mainly in submandibular and axillary regions. All had an increased C reactive protein and six had elevated erythrocyte sedimentation rate. Five had leukocytosis and four an elevated serum lactate dehydrogenase. The disease subsided in all, even in one patient that did not receive antimicrobials. CONCLUSIONS: Cat-scratch disease should be considered in the differential diagnosis of adult patients with lymph adenitis and fever.
Assuntos
Bartonella henselae , Doença da Arranhadura de Gato/diagnóstico , Febre/microbiologia , Adulto , Animais , Antibacterianos/uso terapêutico , Azitromicina/uso terapêutico , Doença da Arranhadura de Gato/sangue , Doença da Arranhadura de Gato/tratamento farmacológico , Gatos , Criança , Diagnóstico Diferencial , Feminino , Humanos , Linfonodos/patologia , Masculino , Pessoa de Meia-Idade , Estudos RetrospectivosRESUMO
Background: Cat-scratch disease is common among children. Among adults the disease is less often considered in the differential diagnosis of enlarged lymph nodes and fever. Aim: To report the clinical and laboratory features of eight patients with cat-scratch disease. Material and methods: Review of the medical records of eight patients (aged 22 to 57 years, six males) with a serological diagnosis of cat-scratch disease (an IgG titer over 1:256, by immunofluorescence). Results: Only five patients recalled having had contact with cats. Seven had fever and weight loss. Six had excessive sweating and five had chills. Seven had painfully enlarged lymph nodes mainly in submandibular and axillary regions. All had an increased C reactive protein and six had elevated erythrocyte sedimentation rate. Five had leukocytosis and four an elevated serum lactate dehydrogenase. The disease subsided in all, even in one patient that did not receive antimicrobials. Conclusions: Cat-scratch disease should be considered in the differential diagnosis of adult patients with lymph adenitis and fever.
Assuntos
Adulto , Animais , Gatos , Criança , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Bartonella henselae , Doença da Arranhadura de Gato/diagnóstico , Febre/microbiologia , Antibacterianos/uso terapêutico , Azitromicina/uso terapêutico , Doença da Arranhadura de Gato/sangue , Doença da Arranhadura de Gato/tratamento farmacológico , Diagnóstico Diferencial , Linfonodos/patologia , Estudos RetrospectivosRESUMO
Cat-Scratch Disease (CSD) is a benign lymphadenitis that may progress to severe or recurrent forms, and it is occasionally associated with morbidity. Between January of 1998 and March of 1999, forty-three suspected CSD patients were assessed in the Hospital Cayetano Heredia and the Instituto de Salud del Niño, in Lima, Peru. Twelve patients had a confirmed diagnosis, 8 of whom were women, and the mean age was 10 years old. The majority (53%) of the cases were encountered in the summer. All patients reported having had contact with cats. Fever, malaise, lymphadenopathy and skin lesions were the most frequent clinical features. Twelve patients had indirect immunofluorescence antibody test titers of between 1/50 and 1/800 for Bartonella henselae and Bartonella clarridgeiae. Two lymph node biopsies were histologically compatible with CSD. No positive blood cultures could be obtained. This is the first Peruvian prospective study able to identify B. henselae and B. clarridgeiae in pediatric patients.
Assuntos
Doença da Arranhadura de Gato/diagnóstico , Adolescente , Adulto , Bartonella/isolamento & purificação , Bartonella henselae/isolamento & purificação , Doença da Arranhadura de Gato/sangue , Criança , Pré-Escolar , Feminino , Humanos , Linfonodos/microbiologia , Linfonodos/patologia , Masculino , Peru , Estudos ProspectivosRESUMO
OBJECTIVE: To study the etiology and seroepidemiology of cat-scratch disease (CSD) in Hawaii. METHODS: Blood and fine-needle aspirate (FNA) from the lymph nodes of 39 consecutive patients with clinical CSD were cultured for Bartonella henselae, and blood samples from index cats, stray cats, and dogs were cultured and their sera were tested by indirect fluorescence antibody test for antibodies to B. henselae and Afipia felis. Sera from age- and sex-matched human subjects without cat exposure served as controls. RESULTS: Warthin-Starry staining showed positive results in only 4 of 32 FNAs, and B. henselae was isolated from only one FNA specimen. All of 38 patients who had two or more sera tested had elevated titers of antibody to B. henselae. Only 1 of 48 human control sera had antibody to B. henselae. Of 31 kittens, 21 had positive blood culture results and elevated antibody titers to B. henselae. Of three adult cats, all had negative blood culture results, but they had serologic evidence of past infection. Of 23 adult stray cats, 18 had elevated titers of antibody to B. henselae, but in only one was the blood culture result positive. Results of IFA tests were marginally positive for A. felis in 1 of 29 patients with CSD and in one adult stray cat and one dog. CONCLUSIONS: This study shows that the B. henselae IFA test is both highly sensitive and specific for the detection of infection caused by B. henselae and for the laboratory diagnosis of CSD, and that FNA is seldom helpful in confirming the diagnosis. We further demonstrated that CSD in Hawaii is due to B. henselae and that infection is directly linked to the scratch or bite of a kitten. Older cats seldom have bacteremia but often have serologic evidence of past infection. Our study fails to implicate dogs in the epidemiology of CSD in Hawaii, and A. felis was not etiologically implicated in CSD in the human subjects and animals we studied.