[Septicaemia caused by Klebsiella pneumoniae--a review of 28 cases]. / Sepse por Klebsiella pneumoniae--revisão de 28 casos.

Twenty-eight children with septicaemia and positive blood cultures for Klebsiella pneumoniae were retrospectively studied and compared with 190 children with sepsis caused by other organisms, identified or not in blood cultures. Septicaemia due to Klebsiella pneumoniae occurred more frequently in children older than 2 years of age, especially those who had an underlying disease and, therefore, were malnourished or had an impaired immune defense system that had required invasive procedures and previous hospitalization. Although the case fatality rate was high in both groups, Klebsiella pneumoniae did not contribute to elevate the relative risk of death. In this study, Klebsiella pneumoniae isolates were highly sensitive to colistin (92.9%) and cefoxitin (82.1%), but poorly sensitive to third generation cephalosporin and imipenen.

Septicemia por Staphylococcus aureus em crianças: tolerância bacteriana à vancomicina e poder bactericida do soro / Staphylococcus aureus septicemia in children: bacterial tolerance to vancomycin and serum bactericidal test

OBJETIVO. Analisar a sensibilidade e tolerância das cepas de Staphylococcus aureus isoladas de crianças com septicemia e avaliar o poder bactericida sérico na monitorizaçäo terapêutica desses casos. MÉTODOS. Foram estudados 17 casos de crianças com septicemia por Staphylococcus aureus internadas na Enfermaria de cuidados semi-Intensivos do Instituto da Criança do Hospital das Clínicas da Faculdade de Medicina da Universidade de Säo Paulo. Foram realizados testes de sensibilidade antimicrobiana pelo método de difusäo em disco e diluiçäo em tubo. Foram realizados 29 testes no pico e 23 no vale dos antibióticos utilizados, determinando o poder bactericida do soro. RESULTADOS. As cepas de Staphylococcus aureus de origem hospitalar mostraram resistência a quase todos os antibióticos, exceto vancomicina e pefloxacina. Observou-se fenômeno de tolerância em cinco (50 por cento) das cepas testadas para vancomicina, sendo que quatro apresentaram má evoluçäo clínica. Os testes para determinaçäo do poder bactericida sérico revelaram títulos no pico ò1/8 em 55,5 por cento das observaç 8es; neste grupo a evoluçäo clínica foi melhor. CONCLUSäO. As cepas de Staphylococcus aureus de origem hospitalar estudadas säo multirresistentes. O fenômeno de tolerância antimicrobiana, assim como o poder bactericida do soro em níveis baixos, pode estar associado a má resposta terapêutica. A valorizaçäo do PBS como critério de avaliaçäo terapêutica em infecçöes graves e o papel da tolerância do Staphylococcus aureus à vancomicina merecem maiores estudos

[Staphylococcus aureus septicemia in children: bacterial tolerance to vancomycin and serum bactericidal activity]. / Septicemia por Staphylococcus aureus em criança: tolerância bacteriana à vancomicina e poder bactericida do soro.

PURPOSE: To evaluate the susceptibility and of strains of Staphylococcus aureus isolated from children with septicemia, and to evaluate the importance of the serum bactericidal test. METHODS: Seventeen children with Staphylococcus aureus septicemia admitted to the Semi Intensive Care Unit of the Instituto da Criança do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo were studied. Twenty nine tests in the pico and 23 in the nadir of the antibiotics were made. RESULTS: Strains of Staphylococcus aureus from hospital origin were resistant to all the antibiotics but vancomycin and pefloxacin. The phenomenon of tolerance was seen in 5 (50%) of the strains that were tested for vancomycin, and 4 of the children had a bad evolution. The serum bactericidal tests showed titles in the pico > or = 1/8 in 55.5% of the observations; in this group the evolution was better. CONCLUSION: Strain of Staphylococcus aureus from hospital origin are multiresistant. The phenomenon of antimicrobial tolerance, as well as the serum bactericidal test may be related to a bad therapeutic evolution. The increasing value of the serum bactericidal test as a way to evaluate the therapeutic evolution in severe infections, and the role of the tolerance of the Staphylococcus aureus to vancomycin more studies.