RESUMEN

Urinary tract infection (UTI) is a common condition in women. There is an increased concern on reduction of bacterial susceptibility resulting from wrongly prescribing antimicrobials. This paper summarizes the recommendations of four Brazilian medical societies (SBI - Brazilian Society of Infectious Diseases, FEBRASGO - Brazilian Federation of Gynecology and Obstetrics Associations, SBU - Brazilian Society of Urology, and SBPC/ML - Brazilian Society of Clinical Pathology/Laboratory Medicine) on the management of urinary tract infection in women. Asymptomatic bacteriuria should be screened at least twice during pregnancy (early and in the 3rd trimester). All cases of significant bacteriuria (≥105CFU/mL in middle stream sample) should be treated with antimicrobials considering safety and susceptibility profile. In women with typical symptoms of cystitis, dipsticks are not necessary for diagnosis. Urine cultures should be collected in pregnant women, recurrent UTI, atypical cases, and if there is suspicion of pyelonephritis. First line antimicrobials for cystitis are fosfomycin trometamol in a single dose and nitrofurantoin, 100mg every 6hours for five days. Second line drugs are cefuroxime or amoxicillin-clavulanate for seven days. During pregnancy, amoxicillin and other cephalosporins may be used, but with a higher chance of therapeutic failure. In recurrent UTI, all episodes should be confirmed by urine culture. Treatment should be initiated only after urine sampling and with the same regimens indicated for isolated episodes. Prophylaxis options of recurrent UTI are behavioral measures, non-antimicrobial and antimicrobial prophylaxis. Vaginal estrogens may be recommended for postmenopausal women. Other non-antimicrobial prophylaxis, including cranberry and immunoprophylaxis, have weak evidence supporting their use. Antimicrobial prophylaxis may be offered as a continuous or postcoital scheme. In pregnant women, options are cephalexin, 250-500mg and nitrofurantoin, 100mg (contraindicated after 37 weeks of pregnancy). Nonpregnant women may use fosfomycin trometamol, 3g every 10 days, or nitrofurantoin, 100mg (continuous or postcoital).

Asunto(s)

Antibacterianos/administración & dosificación , Guías de Práctica Clínica como Asunto , Complicaciones Infecciosas del Embarazo/tratamiento farmacológico , Sociedades Médicas , Infecciones Urinarias/tratamiento farmacológico , Femenino , Humanos , Embarazo

RESUMEN

Urinary tract infection (UTI) is a common condition in women. There is an increased concern on reduction of bacterial susceptibility resulting from wrongly prescribing antimicrobials. This paper summarizes the recommendations of four Brazilian medical societies (SBI ­ Brazilian Society of Infectious Diseases, FEBRASGO ­ Brazilian Federation of Gynecology and Obstetrics Associations, SBU ­ Brazilian Society of Urology, and SBPC/ML ­ Brazilian Society of Clinical Pathology/Laboratory Medicine) on the management of urinary tract infection in women. Asymptomatic bacteriuria should be screened at least twice during pregnancy (early and in the 3rd trimester). All cases of significant bacteriuria (≥105 CFU/mL in middle stream sample) should be treated with antimicrobials considering safety and susceptibility profile. In women with typical symptoms of cystitis, dipsticks are not necessary for diagnosis. Urine cultures should be collected in pregnant women, recurrent UTI, atypical cases, and if there is suspicion of pyelonephritis. First line antimicrobials for cystitis are fosfomycin trometamol in a single dose and nitrofurantoin, 100 mg every 6 hours for five days. Second line drugs are cefuroxime or amoxicillin-clavulanate for seven days. During pregnancy, amoxicillin and other cephalosporins may be used, but with a higher chance of therapeutic failure. In recurrent UTI, all episodes should be confirmed by urine culture. Treatment should be initiated only after urine sampling and with the same regimens indicated for isolated episodes. Prophylaxis options of recurrent UTI are behavioral measures, nonantimicrobial and antimicrobial prophylaxis. Vaginal estrogens may be recommended for postmenopausal women. Other non-antimicrobial prophylaxis, including cranberry and immunoprophylaxis, have weak evidence supporting their use. Antimicrobial prophylaxis may be offered as a continuous or postcoital scheme. In pregnant women, options are cephalexin, 250­500 mg and nitrofurantoin, 100 mg (contraindicated after 37 weeks of pregnancy). Nonpregnant women may use fosfomycin trometamol, 3 g every 10 days, or nitrofurantoin, 100 mg (continuous or postcoital)

Asunto(s)

Humanos , Femenino , Embarazo , Infecciones Urinarias/tratamiento farmacológico , Enfermedades Urológicas/tratamiento farmacológico , Mujeres Embarazadas

RESUMEN

OBJECTIVES: Recently, matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) was successfully applied for the detection of carbapenemase activity directly from Gram-negative colonies. Based on this principle, we evaluated the performance of MALDI-TOF MS for rapid detection of carbapenemase activity directly from positive blood culture vials. METHODS: A total of 100 blood culture vials were randomly selected. MALDI-TOF MS carbapenemase assay results were confirmed by the detection of carbapenemase-encoding genes. RESULTS: A total of 110 bacterial isolates were recovered. The MALDI-TOF MS carbapenemase assay identified 21 of 29 (72.4%) of the carbapenemase-producing isolates directly from the blood culture vials, especially those encoding KPC-2 (100%) and SPM-1 (100%), after a 4 h incubation period. Although the majority of OXA-23-producing Acinetobacter baumannii isolates were not identified on day 1, all isolates were identified as carbapenemase producers directly from the colony on the next day. CONCLUSIONS: The MALDI-TOF MS carbapenemase assay is a feasible and rapid test to identify carbapenemase activity directly from blood culture vials. It may contribute to faster readjustment of empirical antimicrobial therapy and implementation of infection control measures.

Asunto(s)

Proteínas Bacterianas/sangre , Espectrometría de Masa por Láser de Matriz Asistida de Ionización Desorción/métodos , beta-Lactamasas/sangre , Acinetobacter baumannii/enzimología , Acinetobacter baumannii/aislamiento & purificación , Humanos , Klebsiella pneumoniae/enzimología , Klebsiella pneumoniae/aislamiento & purificación , Pseudomonas aeruginosa/enzimología , Pseudomonas aeruginosa/aislamiento & purificación

RESUMEN

To analyze whether Escherichia coli strains that cause urinary tract infections (UPEC) share virulence characteristics with the diarrheagenic E. coli (DEC) pathotypes and to recognize their genetic diversity, 225 UPEC strains were examined for the presence of various properties of DEC and UPEC (type of interaction with HeLa cells, serogroups and presence of 30 virulence genes). No correlation between adherence patterns and serogroups was observed. Forty-five serogroups were found, but 64% of the strains belonged to one of the 12 serogroups (O1, O2, O4, O6, O7, O14, O15, O18, O21, O25, O75, and O175) and carried UPEC virulence genes (pap, hly, aer, sfa, cnf). The DEC genes found were: aap, aatA, aggC, agg3C, aggR, astA, eae, ehly, iha, irp2, lpfA(O113), pet, pic, pilS, and shf. Sixteen strains presented aggregative adherence and/or the aatA sequence, which are characteristics of enteroaggregative E. coli (EAEC), one of the DEC pathotypes. In summary, certain UPEC strains may carry DEC virulence properties, mostly associated to the EAEC pathotype. This finding raises the possibility that at least some faecal EAEC strains might represent potential uropathogens. Alternatively, certain UPEC strains may have acquired EAEC properties, becoming a potential cause of diarrhoea.

Asunto(s)

Escherichia coli/clasificación , Escherichia coli/patogenicidad , Infecciones Urinarias/microbiología , Virulencia/genética , Adhesinas de Escherichia coli/metabolismo , Escherichia coli/aislamiento & purificación , Infecciones por Escherichia coli/microbiología , Proteínas de Escherichia coli/inmunología , Proteínas de Escherichia coli/metabolismo , Regulación Bacteriana de la Expresión Génica , Células HeLa , Humanos , Virulencia/fisiología

RESUMEN

A role for proteolytic bacteria in the exacerbation of influenza virus has been shown in natural hosts such as pigs and humans. Four hundred seven samples were collected from the respiratory tract of individuals presenting clinical manifestations, during influenza season (2003-2005) in São Paulo City. The aim of this study was to evaluate the incidence of determined bacteria co-infecting virus in human respiratory tract. Tests, such as bacteriological, immunofluorescence (IF), RT/PCR and hemagglutination (HA) were used for bacterial and viral investigation. Thirty seven (9.09%) positive for influenza virus were screened by IF. The RT/PCR confirmed the presence of influenza virus in these samples. Bacterial and agar casein tests demonstrated that 18 (48.64%) individuals were infected with proteolytic bacteria such as Staphylococcus spp., Streptococcus spp. and Pseudomonas spp. Among these samples, 13 (35.13%) were co-infected with influenza A virus. Influenza type B, co-infecting bacteria were found in five (13.51%) samples. In vitro the S. aureus protease increased the influenza HA titer after contact for 30 min at 25 masculineC. Results revealed the occurrence of co-infection with proteolytic bacteria and influenza in the evaluated individuals. This finding corroborates that virus versus bacteria synergism could be able to potentiate respiratory infection, increasing damage to hosts.

Asunto(s)

Infecciones Bacterianas/complicaciones , Virus de la Influenza A/aislamiento & purificación , Virus de la Influenza B/aislamiento & purificación , Gripe Humana/virología , Adolescente , Adulto , Infecciones Bacterianas/microbiología , Niño , Técnica del Anticuerpo Fluorescente , Hemaglutinación , Humanos , Virus de la Influenza A/genética , Virus de la Influenza B/genética , Gripe Humana/complicaciones , Gripe Humana/microbiología , Pseudomonas/enzimología , Pseudomonas/genética , Pseudomonas/aislamiento & purificación , ARN Viral/análisis , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Staphylococcus/enzimología , Staphylococcus/genética , Staphylococcus/aislamiento & purificación , Streptococcus/enzimología , Streptococcus/genética , Streptococcus/aislamiento & purificación , Activación Viral

RESUMEN

A role for proteolytic bacteria in the exacerbation of influenza virus has been shown in natural hosts such as pigs and humans. Four hundred seven samples were collected from the respiratory tract of individuals presenting clinical manifestations, during influenza season (2003-2005) in São Paulo City. The aim of this study was to evaluate the incidence of determined bacteria co-infecting virus in human respiratory tract. Tests, such as bacteriological, immunofluorescence (IF), RT/PCR and hemagglutination (HA) were used for bacterial and viral investigation. Thirty seven (9.09 percent) positive for influenza virus were screened by IF. The RT/PCR confirmed the presence of influenza virus in these samples. Bacterial and agar casein tests demonstrated that 18 (48.64 percent) individuals were infected with proteolytic bacteria such as Staphylococcus spp., Streptococcus spp. and Pseudomonas spp. Among these samples, 13 (35.13 percent) were co-infected with influenza A virus. Influenza type B, co-infecting bacteria were found in five (13.51 percent) samples. In vitro the S. aureus protease increased the influenza HA titer after contact for 30 min at 25 ºC. Results revealed the occurrence of co-infection with proteolytic bacteria and influenza in the evaluated individuals. This finding corroborates that virus versus bacteria synergism could be able to potentiate respiratory infection, increasing damage to hosts.

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O papel da bactéria proteolítica na exacerbação do vírus influenza tem sido demonstrado em hospedeiros naturais como porcos e humanos. Foram coletadas 407 amostras do trato respiratório de indivíduos apresentando manifestações clínicas, durante a estação da influenza (2003-2005) na cidade de São Paulo. Este trabalho teve como objetivo avaliar a incidência de determinadas bactérias que junto com vírus co-infectarem o trato respiratório humano. Testes bacteriológicos, e virológicos como imunofluorescência (IF), RT/PCR e hemaglutinação (HA) foram usados nas investigações viral e bacteriana. Pelo teste de IF foram selecionadas trinta e sete (9,09 por cento) amostras positivas para o vírus influenza. A presença do vírus influenza foi confirmada pela técnica de RT/PCR. Pelos testes bacteriológicos e do agar caseina, verificou-se que 18 (48,64 por cento) dos indivíduos foram infectados com bactérias proteolíticas tais como Staphylococcus spp., Streptococcus spp. e Pseudomonas spp. Destas amostras, 13 (35,13 por cento) foram co-infectadas com vírus influenza tipo A, e 5 (13,51 por cento) com influenza tipo B. No experimento in vitro com influenza e S. aureus, detectou-se aumento do título hemaglutinante deste vírus, após contacto de 30 min a 25 ºC. Os resultados obtidos revelaram a ocorrência de co-infecção com bactéria proteolítica e vírus influenza nos indivíduos avaliados. Estes achados corroboram com a investigação do sinergismo, entre bactéria e vírus, que poderia ser capaz de potencializar infecção respiratória, aumentando os riscos aos hospedeiros.

Asunto(s)

Adolescente , Adulto , Niño , Humanos , Infecciones Bacterianas/complicaciones , Virus de la Influenza A/aislamiento & purificación , Virus de la Influenza B/aislamiento & purificación , Gripe Humana/virología , Infecciones Bacterianas/microbiología , Técnica del Anticuerpo Fluorescente , Hemaglutinación , Virus de la Influenza A/genética , Virus de la Influenza B/genética , Gripe Humana/complicaciones , Gripe Humana/microbiología , Pseudomonas/enzimología , Pseudomonas/genética , Pseudomonas/aislamiento & purificación , ARN Viral/análisis , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Staphylococcus/enzimología , Staphylococcus/genética , Staphylococcus/aislamiento & purificación , Streptococcus/enzimología , Streptococcus/genética , Streptococcus/aislamiento & purificación , Activación Viral

Asunto(s)

Cefoxitina/farmacología , Oxacilina/farmacología , Resistencia a las Penicilinas , Staphylococcus/efectos de los fármacos , Antibacterianos/farmacología , Brasil , Coagulasa/metabolismo , Humanos , Pruebas de Sensibilidad Microbiana/instrumentación , Pruebas de Sensibilidad Microbiana/métodos , Infecciones Estafilocócicas/microbiología , Staphylococcus/enzimología , Staphylococcus/genética

RESUMEN

OBJETIVO: Determinar a prevalência de bacteremia e os fatores associados no período pré-operatório em portadores de colecistite aguda litiásica e analisar comparativamente as complicações e mortalidade nos pacientes com e sem bacteremia, que foram submetidos a colecistectomia de urgência. MÉTDODOS: Foram estudados, prospectivamente, 51 pacientes com diagnóstico histopatológico de colecistite aguda litiásica. O sistema Bactec foi o método utilizado para a detecção de bacteremia. As médias dos grupos foram analisadas quanto às variáveis clínicas e laboratoriais, relacionando-as com a bacteremia. RESULTADOS: A prevalência de bacteremia no pré-operatório foi de 15,68 por cento, e a idade (p=0,024), a freqüência cardíaca (p=0,026), a freqüência respiratória (p=0,028), a creatinina (p=0,028) e a presença da SIRS (Síndrome da Resposta Inflamatória Sistêmica, p=0,016) associaram-se positivamente com a bacteremia. Nos portadores de bacteremia verificou-se um óbito, maior número de complicações gerais (p=0,045) e infecciosas (p=0,039) e maior tempo de internação (p<0,005). CONCLUSAO: Nessa amostra, utilizando-se o sistema Bactec, a prevalência de bacteremia foi considerável. Fatores clínicos e laboratoriais estão associados à bacteremia e a sua presença associa-se à maior gravidade dos pacientes e pior prognóstico em relação às complicações no pós-operatório nos portadores de colecistite aguda litiásica.

Asunto(s)

Humanos , Adulto , Persona de Mediana Edad , Anciano de 80 o más Años , Bacteriemia/mortalidad , Colecistitis Aguda/microbiología , Cuidados Preoperatorios , Bacteriemia/sangre , Bacteriemia/microbiología , Brasil/epidemiología , Técnicas de Cultivo de Célula , Colecistectomía , Colecistitis Aguda/sangre , Infecciones por Escherichia coli/microbiología , Infecciones por Klebsiella/microbiología , Prevalencia , Estudios Prospectivos , Estadísticas no Paramétricas

RESUMEN

BACKGROUND: Bacteremia seems to increase the morbidity and mortality in clinical and surgical conditions, however the importance and factors associated with it during acute calculous cholecystitis are not well established. The purpose of this study was to determine pre-operative prevalence, associated factors and prognosis of bacteremia in patients with acute calculous cholecystitis submitted to an emergency cholecystectomy. METHODS: A prospective study of 51 patients with histological diagnosis of acute calculous cholecystitis was designed. The Bactec System was used to detect bacteremia. Mean results of clinical and laboratory analyses were related to the presence of bacteremia. RESULTS: The pre-operative prevalence of bacteremia was of 15.68%. Age (P=0.024), heart rate (P=0.026), respiratory rate (P=0.028), serum creatinine (P=0.028) and presence of systemic inflammatory response syndrome (P=0.016) were positively associated with bacteremia. Bacteremic patients had statistically higher overall (P=0.045) and infectious (P=0.039) complication rates and longer hospitalization (P<0.005) including one death. CONCLUSIONS: Patients with acute calculous cholecystitis have a considerable prevalence of bacteremia in the pre-operative period. It is associated with old age, heart rate, respiratory rate, serum creatinine and systemic inflammatory response syndrome. In patients with acute calculous cholecystitis, presence of bacteremia may be associated to severity of the condition and poor outcome related to pos-operative complications.

Asunto(s)

Bacteriemia/epidemiología , Colecistitis Aguda/microbiología , Adulto , Anciano , Anciano de 80 o más Años , Bacteriemia/microbiología , Brasil/epidemiología , Colecistectomía , Infecciones por Escherichia coli/microbiología , Humanos , Infecciones por Klebsiella/microbiología , Persona de Mediana Edad , Cuidados Preoperatorios , Prevalencia , Estudios Prospectivos , Estadísticas no Paramétricas

RESUMEN

In São Paulo State, Brazil, the epidemic increase in isolation of Salmonella Enteritidis has been observed since 1994. A total of 105 S. Enteritidis strains (72 from human and 33 from non-human sources) isolated during the period 1975-1995, previously characterized by phage typing, was analyzed by antimicrobial susceptibility, plasmid profile, and ribotyping. Over 70% of the strains were susceptible to all antimicrobial agents tested, however, multiple resistance to antimicrobials was observed among the studied strains, mainly those from hospitalized patients. Phage type 8 (PT-8) was predominant among the strains isolated during the period of 1975-1992, but in the following years, PT-4 was the most frequent phage type identified. Seven different plasmid profiles were detected and 96% of the isolates harbored a plasmid of approximately 36 MDa. Ribotyping discriminated fourteen ribotypes (R1 to R14) among the strains examined. By analysis of dendrogram the strains were included in three groups with similarity level of 60%. The obtained results indicate that, a single ribotype (R11), determined for PT-4 strains isolated from 1993, characterizes the epidemic clone of S. Enteritidis in our region.

Asunto(s)

ADN Bacteriano/análisis , Fenotipo , Salmonella enteritidis/genética , Tipificación de Bacteriófagos , Brasil , Farmacorresistencia Bacteriana , Humanos , Pruebas de Sensibilidad Microbiana , Plásmidos/clasificación , Plásmidos/genética , Ribotipificación , Salmonella enteritidis/clasificación , Salmonella enteritidis/efectos de los fármacos

RESUMEN

In São Paulo State, Brazil, the epidemic increase in isolation of Salmonella Enteritidis has been observed since 1994. A total of 105 S. Enteritidis strains (72 from human and 33 from non-human sources) isolated during the period 1975-1995, previously characterized by phage typing, was analyzed by antimicrobial susceptibility, plasmid profile, and ribotyping. Over 70 percent of the strains were susceptible to all antimicrobial agents tested, however, multiple resistance to antimicrobials was observed among the studied strains, mainly those from hospitalized patients. Phage type 8 (PT-8) was predominant among the strains isolated during the period of 1975-1992, but in the following years, PT-4 was the most frequent phage type identified. Seven different plasmid profiles were detected and 96 percent of the isolates harbored a plasmid of approximately 36 MDa. Ribotyping discriminated fourteen ribotypes (R1 to R14) among the strains examined. By analysis of dendrogram the strains were included in three groups with similarity level of 60 percent. The obtained results indicate that, a single ribotype (R11), determined for PT-4 strains isolated from 1993, characterizes the epidemic clone of S. Enteritidis in our region

Asunto(s)

Humanos , ADN Bacteriano , Fenotipo , Salmonella enteritidis , Tipificación de Bacteriófagos , Brasil , Farmacorresistencia Microbiana , Pruebas de Sensibilidad Microbiana , Plásmidos , Ribotipificación , Salmonella enteritidis

RESUMEN

The emergence of vancomycin-resistant enterococci (VRE) has been described recently in Brazil. This is in contrast to the USA and Europe, where the VRE appeared in the late 1980s. The progressive increase in VRE isolation poses important problems in the antimicrobial therapy of nosocomial infections. Treatment options and effective antimicrobial agents for VRE are often limited and the possibility of transfer of vancomycin genes to other Gram-psitive microorganisms continues. In the search for antimicrobial agents for multiresistant Gram-positive cocci, compounds such as linezolid and quinupristin/dalfopristin have been evaluated. The present study was conducted to evaluate the in vitro activity of the oxazolidinone linezolid and 10 other antimicrobial agents, including quinupristin-dalfopristin, against enterococci isolated in Brazilian hospitals. Thirty-three vancomycin resistant isolates (17 Enterococcus faecium and 16E.faecalis), were analyzed. Strains were isolated from patients at Säo Paulo Hospital, Oswaldo Cruz Hospital, Hospital do Servidor Público Estadual, Santa Marcelina Hospital, Santa Casa de Misericórdia de Säo Paulo, and hospital das Clínicas do Paraná. The samples were tested by a broth microdilution method following the National Committee for Clinical Laboratory Standards (NCCLS) recommendations. All isolates were molecular typed using pulsed-field gel electrophoresis (PFGE). Linezolid was the most active compound against there multiresistant enterocci, showing 100 porcent inhibition at the susceptible breakpoints. Quinupristin and teicoplanin showed poor activy against both species. The molecular ryping results suggest that there has been interhospital spread of vacomycin resistant E. faecium and E. faecalis among Brazilian hospitals. The results of this study indicate that linezolid is an appropriate therapetic option for the treatment of vacomycin-resistant enterococci infections Brazil.

Asunto(s)

Humanos , Enterococcus faecalis , Enterococcus faecium , Técnicas In Vitro , Infección Hospitalaria/epidemiología , Infección Hospitalaria/tratamiento farmacológico , Resistencia a la Vancomicina , Clonación Molecular , Electroforesis en Gel de Campo Pulsado , Hospitales , Pacientes Internos , Pruebas de Sensibilidad Microbiana , Resistencia a Múltiples Medicamentos

RESUMEN

A peritonite bacteriana espontânea (PBE) é uma freqüente e grave complicaçäo da ascite de portadores de cirrose hepática. Este trabalho apresenta um estudo comparativo sobre a sensibilidade de três diferentes métodos de cultura para o isolamento de bactérias em pacientes com ascite neutrofílica. Foram estudados 32 pacientes portadores de ascite neurotrofílica detectada dentro de 24h de admissäo hospitalar. O líquido colhido através de paracentese foi levado ao laboratório em frasco estéril para semeadura ou inoculado à beira do leito em frascos de hemocultura convencional (Hemobacâ) e em Bactec Ped Plusâ. Dos 32 pacientes, 43,75 por cento apresentaram cultura positiva. A inoculaçäo à beira do leito quer em Bactec Ped Plus (37,5 por cento) quer em Hemobac (37,4 por cento) apresentou maior positividade que a cultura convencional (25 por cento), além de maior rapidez na identificaçäo do crescimento bacteriano. Elevado nível de concordância foi observado para a inoculaçäo em Bactec Ped Plus e em Hemobac.

Asunto(s)

Humanos , Adolescente , Adulto , Persona de Mediana Edad , Ascitis/complicaciones , Ascitis/microbiología , Cirrosis Hepática/complicaciones , Medios de Cultivo , Líquido Ascítico/microbiología , Peritonitis/etiología , Sensibilidad y Especificidad

RESUMEN

O presente estudo tem como objetivo comparar a atividade in vitro de uma nova cefalospirina (4ª geraçåo), a cefepima, com a da ceftadizima. Foram testadas, através da técnica de microdiluiçåo em placa, 1015 amostras bacterianas clínicas isoladas no Hospital Såo Paulo/Escola de Medicina no período de junho a julho de 1992. Para as espécies de endobactérias de maneira geral, a concentraçåo de antimicrobianos que inibiu 50 por cento das amostras (MIC 50) variou de <0,12 a u2 g/ml tanto para a cefepima quanto para a ceftazidima. Porém, a porcentagem de amostras de Enterobacter spp. sucetíveis foi superior para a cefepima (74//versus 61 por cento). Contra as amostras de Pseudomonas aeroginosa, a ceftazidima apresentou potência pouco superior àquela demonstrada pela cefepima (MIC50s de ug/ml e 8 ug/ml respectivamente), com porcentagem de sensibilidade também superior (73 por cento versus 59 por cento). Das 569 amostras de bacilos gram-negativos avaliadas, 85 por cento foram suscetíveis à ceftdazidima e 80 por cento à cefepima. Entre os cocos garm-positivos, como os Staphylococcus aureus sensíveis à oxacilina, a cefepima (MIC90 4ug/ml) foi duas a quatro vezes mais ativa que a ceftazidima (MIC90 16ug/ml). Porém, como já era esperado, as amostras de estafilococos resistentes à oxacilina e as amostras de Enterococcus faecalis foram resistentes às duas drogas testadas, com MIC50>16ug/ml. Nesse estudo, a cefepima mostrou atividade e espectro contra gram-negativos semelhantes àquele das cefasporinas de 3ª geraçåo com atividade antipseudomonas (ceftazidima). Além disso, sua atividade contra gram-positivos foi semelhante àquela demosnstrada pelas celafosporinas de 1ª geraçåo. Apesar do avanço conquistado com as cefalosporinas de 4ª geraçåo, o uso extensivo e/ou inapropriado dessas drogas facilitará o aparecimento de cepas resistentes e a pesquisa por substâncias mais ativas deve continuar

Asunto(s)

Bacterias Gramnegativas , Bacterias Grampositivas , Cefalosporinas/análisis , Farmacorresistencia Microbiana

RESUMEN

O pulmäo é o órgäo mais acometido na AIDS, evidenciado em geral nos estádios iniciais da doença. O comportamento pulmonar pode ser devido tanto às afecçöes oportunistas, que na maioria das vezes decorre de reativaçäo de infecçöes latentes, como a neoplasias ou outras doenças näo-infecciosas. Com o objetivo de determinar o padräo radiológico das afecçöes pulmonares que acometem os pacientes portadores de HIV acompanhados no Serviço de Doenças Infecciosas e Parasitárias do Hospital Säo Paulo/Escola Paulista de Medicina, foram realizadas 82 broncoscopias com biópsia transbrônquica (BTB) e coleta de lavado bronquíolo-alveolar (LBA) em 81 pacientes no período de julho de 1989 a dezembro de 1990. Infiltrado interstício-nodular difuso, com ausência de derrame pleural, cavitaçäo ou condensaçäo, foi o achado radiológico mais freqüente, sendo encontrado em 43// doa pacientes com micobacteriose, 43// dos pacientes com pneumonia por Pneumocystis carinii (PPC), 64// dos pacientes com pneumonite intersticial inespecífica (PII) e 73// dos pacientes com pneumonia bacteriana. O diagnóstico de PPC foi estabelecido em apenas 11// dos pacientes que apresentavam somente infiltrado interstício-nodular difuso à radiografia de tórax. Nossos dados permitiram concluir que o infiltrado interstício-nodular difuso (HND) e o padräo radiológico mais freqüente nas principais afecçöes pulmonares que acometem pacientes com AIDS e que apenas uma pequena porcentagem dos pacientes que apresentam sinais e sintomas pulmonares inespecíficos, com HND à radiografia de tórax, tem o diagnóstico confirmado de PPC

Asunto(s)

Humanos , Masculino , Femenino , Adolescente , Adulto , Broncoscopía , Infecciones por Mycobacterium no Tuberculosas/complicaciones , Síndrome de Inmunodeficiencia Adquirida/etiología , Tórax , Tuberculosis Pulmonar/complicaciones , Infecciones por Mycobacterium no Tuberculosas/complicaciones , Neumonía por Pneumocystis/diagnóstico , Pulmón/lesiones , Tuberculosis Pulmonar/diagnóstico

Asunto(s)

Humanos , Masculino , Femenino , Adolescente , Adulto , Persona de Mediana Edad , Broncoscopía , Pulmón/patología , Síndrome de Inmunodeficiencia Adquirida/complicaciones , Tuberculosis Pulmonar/etiología , Biopsia , Infecciones Oportunistas/diagnóstico , Neumonía por Pneumocystis/etiología , Sulfametoxazol/uso terapéutico , Trimetoprim/uso terapéutico