Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 10 de 10
Filter
1.
Rev. Inst. Med. Trop. Säo Paulo ; 55(1): 1-6, Jan.-Feb. 2013. ilus, tab
Article in English | LILACS | ID: lil-661095

ABSTRACT

Bacteria of the genus Bartonella are emerging pathogens detected in lymph node biopsies and aspirates probably caused by increased concentration of bacteria. Twenty-three samples of 18 patients with clinical, laboratory and/or epidemiological data suggesting bartonellosis were subjected to three nested amplifications targeting a fragment of the 60-kDa heat shock protein (HSP), the internal transcribed spacer 16S-23S rRNA (ITS) and the cell division (FtsZ) of Bartonella henselae, in order to improve detection in clinical samples. In the first amplification 01, 04 and 05 samples, were positive by HSP (4.3%), FtsZ (17.4%) and ITS (21.7%), respectively. After the second round six positive samples were identified by nested-HSP (26%), eight by nested-ITS (34.8%) and 18 by nested-FtsZ (78.2%), corresponding to 10 peripheral blood samples, five lymph node biopsies, two skin biopsies and one lymph node aspirate. The nested-FtsZ was more sensitive than nested-HSP and nested-ITS (p < 0.0001), enabling the detection of Bartonella henselae DNA in 15 of 18 patients (83.3%). In this study, three nested-PCR that should be specific for Bartonella henselae amplification were developed, but only the nested-FtsZ did not amplify DNA from Bartonella quintana. We conclude that nested amplifications increased detection of B. henselae DNA, and that the nested-FtsZ was the most sensitive and the only specific to B. henselae in different biological samples. As all samples detected by nested-HSP and nested-ITS, were also by nested-FtsZ, we infer that in our series infections were caused by Bartonella henselae. The high number of positive blood samples draws attention to the use of this biological material in the investigation of bartonellosis, regardless of the immune status of patients. This fact is important in the case of critically ill patients and young children to avoid more invasive procedures such as lymph nodes biopsies and aspirates.


Bactérias do gênero Bartonella constituem patógenos emergentes detectados em biópsias de linfonodos e secreções de gânglios provavelmente devido a maior concentração de bactérias. Vinte e três amostras de 18 pacientes com dados clínicos, laboratoriais e/ou epidemiológicos sugestivos de bartonelose foram submetidas a três amplificações duplas para a detecção de fragmento da proteína de choque térmico de 60-kDa (HSP), do espaçador interno 16S-23S rRNA (ITS) e da proteína de divisão celular (FtsZ) de Bartonella henselae, para melhorar a detecção em amostras clínicas. Na primeira amplificação, uma, quatro e cinco amostras, respectivamente, foram positivas pelo HSP (4,3%), FtsZ (17,4%) e pelo ITS (21,7%). Com a segunda amplificação foram identificadas seis amostras positivas pelo nested-HSP (26%), oito pelo nested-ITS (34,8%) e 18 pelo nested- FtsZ (78,2%), correspondentes a 10 amostras de sangue periférico, cinco biópsias de linfonodos, duas biópsias de pele e um aspirado de gânglio. A nested-FtsZ foi mais sensível que a nested-HSP e a nested-ITS (p < 0,0001), possibilitando a detecção de DNA de Bartonella henselae em 15 de 18 pacientes (83,3%). No presente estudo, três nested-PCR, consideradas específicas para a amplificação da Bartonella henselae, foram desenvolvidas, porém somente a nested-FtsZ não amplificou o DNA de Bartonella quintana. Concluímos que amplificações duplas aumentaram a detecção de DNA de B. henselae, e que a nested-FtsZ foi a mais sensível e a única específica para B. henselae em diferentes amostras biológicas. Como todas as amostras detectadas pelo HSP-nested e nested-ITS foram também pela nested-FtsZ, inferimos que, em nossa casuística, as infecções foram causadas por Bartonella henselae. A elevada positividade de amostras de sangue chamou a atenção para a utilização deste material biológico na investigação de bartoneloses, independentemente do estado imune dos pacientes. Este fato é importante no caso de pacientes criticamente enfermos e crianças pequenas para evitar procedimentos mais invasivos, como biópsias e punções de gânglios.


Subject(s)
Adolescent , Adult , Aged, 80 and over , Child , Child, Preschool , Female , Humans , Male , Middle Aged , Bartonella henselae/genetics , Cat-Scratch Disease/microbiology , DNA, Bacterial/analysis , /analysis , Bartonella henselae/isolation & purification , Cat-Scratch Disease/diagnosis , /analysis , DNA, Ribosomal Spacer/analysis , Immunocompetence , Immunocompromised Host , Lymph Nodes/microbiology , Polymerase Chain Reaction , Sensitivity and Specificity
2.
An. bras. dermatol ; 86(4,supl.1): 121-124, jul,-ago. 2011. ilus
Article in Portuguese | LILACS | ID: lil-604139

ABSTRACT

A esporotricose é micose subaguda ou crônica, causada pelo fungo dimórfico Sporothrix schenckii, endêmica no Brasil e transmitida principalmente através da inoculação traumática de seu agente causal na pele. A transmissão zoonótica, especialmente por gatos infectados, tem sido demonstrada em diversos relatos e séries de casos. Nós descrevemos a ocorrência simultânea da doença em três membros de uma mesma família através da arranhadura por gato doméstico infectado. Dois pacientes desenvolveram a forma cutânea-linfática e apenas um desenvolveu a forma cutânea fixa. Dois pacientes foram tratados com sucesso, com solução saturada de iodeto de potássio; entretanto, o terceiro caso apresentou efeitos colaterais e teve seu tratamento substituído por itraconazol, com resolução de suas lesões.


Sporotrichosis is a subacute or chronic mycosis caused by the dimorphic fungus Sporothrix schenckii which is endemic in Brazil and is transmitted primarily through traumatic inoculation of its causative agent into the skin. The zoonotic transmission, especially from infected cats, has been demonstrated in several reports and case series. We present simultaneous occurrence of the disease in three members of the same family by scratches from an infected domestic cat. Two patients developed the lymphocutaneous form and one only developed the fixed cutaneous form. Two patients were successfully treated with saturated solution of potassium iodide; however, the third case reported side effects and had his therapy substituted for itraconazole, with resolution of his lesions.


Subject(s)
Adult , Aged , Animals , Cats , Female , Humans , Male , Middle Aged , Cat-Scratch Disease/transmission , Sporotrichosis/transmission , Zoonoses/transmission , Cat-Scratch Disease/microbiology , Sporothrix/isolation & purification , Sporotrichosis/microbiology , Zoonoses/microbiology
3.
Braz. j. infect. dis ; 10(6): 411-415, Dec. 2006. ilus
Article in English | LILACS | ID: lil-446745

ABSTRACT

Cat-scratch disease warrants extensive investigation, from an epidemiological, a diagnostic, but especially a therapeutic point of view. Two suggestive episodes of Bartonella henselae-caused cat-scratch disease are reported, and discussed in the light of the most recent literature evidence. The first case occurred in a 60-year-old man, thus suggesting that it is important to maintain an elevated level of suspicion for this disease in adults as well. Both episodes were characterized by a very prolonged and complicated disease course (with the involvement of three lymph node sets in the first case), a need for lymph-node drainage, and apparently negligible activity of many antimicrobial courses, with a very slow local cure. While specific culture and molecular biology techniques proved negative (probably due to late availability of appropriate clinical specimens), indirect immunofluorescence antibody assay was positive since the first weeks of disease, and elevated levels were also fond many months after disease onset. When clinicians face patients with prominent swelling of lymph nodes draining from the upper limbs, cat-scratch disease may be suspected on the grounds of epidemiological and clinical features, with a limited systemic involvement contrasting with a prominent local disease. The significance of specific antibody temporal kinetics in the subacute disease course is still unknown. Although biomolecular assays are now available, the time elapsed from disease onset to clinical diagnosis usually hampers diagnosis, while the roles of surgical debridement and of the unpredictable activity of antimicrobial chemotherapy warrant careful investigation.


Subject(s)
Animals , Cats , Humans , Male , Middle Aged , Bartonella Infections/diagnosis , Bartonella henselae/immunology , Cat-Scratch Disease/diagnosis , Anti-Bacterial Agents/therapeutic use , Bartonella Infections/drug therapy , Cat-Scratch Disease/drug therapy , Cat-Scratch Disease/microbiology , Fluorescent Antibody Technique, Indirect , Treatment Outcome
4.
Ciênc. rural ; 34(6): 1961-1963, nov.-dez. 2004.
Article in Portuguese | LILACS | ID: lil-389008

ABSTRACT

A esporotricose é uma micose subcutânea, causada pelo fungo dimórfico Sporothrix schenckii. O presente estudo descreve a ocorrência de esporotricose felina na cidade de Pelotas (Rio Grande do Sul - Brasil), e a transmissão para um atendente da clínica veterinária, ocasionada pela arranhadura do animal doente. O felino apresentava deformação do espelho nasal e lesões cutâneas, enquanto o humano apresentava uma lesão ulcerada na região metacarpiana dorsal esquerda. Foram colhidas crostas e/ou exsudato das lesões do felino e do atendente para diagnóstico micológico, os quais foram cultivados em ágar Sabouraud dextrose acrescido de cloranfenicol e incubados a 25 e 37ºC, durante 10 dias. O isolamento do S. schenckii confirmou o diagnóstico clínico de esporotricose cutânea disseminada no felino e cutânea localizada no atendente. Esta nota pretende alertar profissionais relacionados à clínica de pequenos animais quanto à existência da doença e o alto risco de transmissão pela mordedura e/ou arranhadura de animais infectados.


Subject(s)
Cats , Cat-Scratch Disease/microbiology , Mycoses , Zoonoses
6.
Braz. j. infect. dis ; 7(1): 1-6, Feb. 2003. tab
Article in English | LILACS | ID: lil-351150

ABSTRACT

The human bartonelloses are a group of diseases with a rapidly increasing clinical spectrum. Well known manifestations such as Carrion's disease, trench fever, cat-scratch disease, and bacillary angiomatosis are examples of Bartonella spp. infection. Along with these diseases, recurrent bacteremia, endocarditis, septicemia, erythema nodosum, erythema multiforme, trombocytopenic purpura and other syndromes have been reported having been caused by bacteria of this genus. The infectious process and the pathogenesis of these microorganisms are poorly understood. The bartonelloses may have a benign and self-limited evolution in a host, or a potentially fatal one. These bacteria can provoke a granulomatous or an angioproliferative histopathologic response. As these diseases are not yet well defined, we have reviewed the four main human bartonelloses and have examined unclear points about these emergent diseases


Subject(s)
Animals , Cats , Humans , Bartonella Infections/microbiology , Bartonella/classification , Angiomatosis, Bacillary/diagnosis , Angiomatosis, Bacillary/microbiology , Angiomatosis, Bacillary/transmission , Bartonella Infections/pathology , Bartonella Infections/transmission , Bartonella/pathogenicity , Cat-Scratch Disease/diagnosis , Cat-Scratch Disease/microbiology , Cat-Scratch Disease/transmission , Immunocompromised Host , Trench Fever/diagnosis , Trench Fever/microbiology , Trench Fever/transmission
7.
Folia dermatol. peru ; 11(1): 21-9, abr. 2000. ilus, tab
Article in Spanish | LILACS, LIPECS | ID: lil-289491

ABSTRACT

Enfermedad del arañazo de gato es descrita como una linfadenitis, que puede progresar a una forma severa o recurrente, y ocasionalmente asociada a morbilidad; cuyas características eran desconocidas en nuestro país. Se incluyeron 43 pacientes, 46.51 por ciento fueron hombres y 53.49 por ciento mujeres. La media de la edad fue 14.09 años, 74.4 por ciento menores de 18 años. Durante el verano 53.33 por ciento fueron captados. Contacto con gatos presentaron el 93.02 por ciento de los pacientes. Las manifestaciones clínicas principales fueron fiebre y malestar general, y el hallazgo de linfoadenonegalia y la lesión de inoculación. Doce pacientes presentaron títulos entre 1/50 a 1/800 para B. henselae y B.Clarridgeae utilizando IFI. Tres muestras anatomopatológicos fueron características, otras seis fueron sugerentes. No se logró preservar colonias en los cultivos microbiológicos. El presente trabajo es el primer estudio prospectivo nacional de enfermedad del arañazo de gato, logrando identificar B. henselae y B. clarridgeae, principalmente en pacientes de edad pediátrica.


Subject(s)
Humans , Male , Female , Adolescent , Adult , Bartonella , Cat-Scratch Disease/diagnosis , Cat-Scratch Disease/microbiology , Cat-Scratch Disease/pathology , Cat-Scratch Disease/therapy , Cat-Scratch Disease/transmission , Cat-Scratch Disease/epidemiology , Peru , Cross-Sectional Studies , Prospective Studies , Hospitals, State , Epidemiology, Descriptive
SELECTION OF CITATIONS
SEARCH DETAIL