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1.
Emerg. infect. dis ; Vol10(1)2004.
Article in English | AIM | ID: biblio-1261641

ABSTRACT

We report the first laboratory-confirmed case of Rickettsia mongolotimonae infection in Africa. The patient sought treatment for an eschar on his toe; lymphangitis; severe headaches; and fever subsequently developed. After a regimen of doxycycline; symptoms rapidly resolved. R. mongolotimonae infection was diagnosed retrospectively by serologic tests and molecular-based detection of the organism in biopsy specimens of eschar material


Subject(s)
Rickettsia Infections , Rickettsia conorii
2.
Diagnóstico (Perú) ; 42(4): 151-153, jul.-ago. 2003. ilus
Article in Spanish | LILACS, LIPECS | ID: lil-357143

ABSTRACT

En el Perú la Angiomatosis bacillar (AB) y la enfermedad de Arañazo de Gato (EAG) han sido reportados confirmando el diagnóstico en laboratorios de investigación o del extranjero, no contándose con métodos de rápido diagnóstico. Se captaron 23 pacientes y se estudiaron 8 muestras de tejidos con sospecha de EAG,AB o Verruga Peruana (VP). Se realizaron cultivos en condiciones requeridas. Extracción de DNA de sangre, cultivos y tejidos mediante buffers de digestión fueron estandarizados para cada caso. Se amplificó el DNA con primers 16S-ITRFf y 23S-ITRr ó CS-ITRf y CSITRr; en gel de agarosa 1 por ciento, y cuantificados con DNA -Hind III. Cultivos controles mostraron banda en B. bacilliformis de 948 pb, B. quintana 1310 pb, B henselae 1427 pb. M. tuberculosus 563 pb. Un paciente con diagnóstico confirmado de EAG por B. henselae, mostró banda concordante con control de B. henselae utilizando los primers 16S y 23S. Una muestra de VP mostró banda concordante con control de B. bacilliformis. una muestra confirmada por patología de AB mostró bandas concordantes a B. henselae utilizando el primer CS. Se confirmaron casos de EAG, AB y VP en base a muestras de aspirados de ganglio o biopsia mediante PCR. El PCR permitió el diagnóstico diferencial de adenomagalias por EAG y Micobacterias, y de AB en la Verruga Peruana.


Subject(s)
Humans , Male , Female , Bartonella Infections , Cat-Scratch Disease , Angiomatosis, Bacillary , Polymerase Chain Reaction
3.
Rev. Inst. Med. Trop. Säo Paulo ; 44(6): 325-330, Nov.-Dec. 2002. ilus, tab, graf
Article in English | LILACS | ID: lil-326351

ABSTRACT

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 percent) 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


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Adult , Cat-Scratch Disease , Bartonella , Bartonella henselae , Cat-Scratch Disease , Lymph Nodes , Peru , Prospective Studies
4.
Rev. méd. hered ; 13(2): 58-63, jun. 2002. ilus
Article in Spanish | LILACS, LIPECS | ID: biblio-1110966

ABSTRACT

Introducción: La técnica de PCR amplifica una secuencia de ADN con la enzima polimerasa; es muy sensible y especifica. Objetivo: Estandarizar una técnica de PCR para identificar Bartonella bacilliformis en sangre total de pacientes con bartonelosis aguda. Material y métodos: Se usó muestras de sangre total de seis pacientes con diagnóstico clínico y microbiológico de bartonelosis aguda. Se extrajo el ADN de sangre total usando el detergente guanidina DNAZOL BD. Se amplificó el ADN usando los cebadores de extensión "primers" 16S y 23S del espaciador de trascripción interna (ITS). Se hizo electroforesis de los productos de amplificación en gel de agarosa. Se compararon los pesos moleculares de las bandas observadas en la electroforesis con un marcador de 100 pares de bases. Resultados: Se determinó que la concentración de ADN extraído por DNAZOL BD corresponde alrededor de 6 ng de ADN. El producto amplificado de muestras de sangre total fue alrededor de 1000 pares de bases, idéntico al extraído de los hemocultivos de B. bacilliformis y claramente diferente del de otras especies. Las diluciones de las extracciones mejor detectadas por PCR fueron 1/5 y 1/10. Conclusiones: El ADN de B. bacilliformis extraído con DNAZOL BD de sangre total de pacientes con bartonelosis aguda es amplificado por PCR utilizando los primers 16S y 23S; es posible usar esta técnica para el diagnóstico etiológico rápido.


Background: The PCR methodology amplifies a sequence of DNA with the Polimerase enzyme; the sensibility and specificity is very high. Objective: To develop a PCR methodology designed to work on extracts from whole blood samples rather than from isolated, cultured organisms. Methods. The whole blood of six patients with clinical and microbiologic diagnosis of acute bartonelosis by B. bacilliformis was used. The DNA was extracted with DNAZOL® BD (lysis solution with guanidine detergent), and the extract subjected to PCR using primers 16S and 23S for the Intergenic Transcribed Spacer (ITS). The amplified products were subjected to electrophoresis on 1 per cent agarose gels. Results: The concentration of the extracted product with DNAZOL® BD was around 6 ng. The amplified single sized product of 1000 base pairs was identical to that from authentic cultures of B. bacilliformis and clearly different from that of other species. The dilutions detected by PCR were 1/5 and 1/10. Conclusion: The amplification of the DNA of B. bacilliformis extracted with DNAZOL® BD from whole blood of patients with acute bartonelosis using the primers 16S and 23S is possible using this method for a fast etiologic diagnosis. ( Rev Med Hered 2002; 13: 58-63 ).


Subject(s)
Humans , Sequence Analysis, DNA , Bartonella
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