Epidemiology of Pseudomonas aeruginosa in a general hospital: a four-year study.

A retrospective study was done to determine the epidemiology of infection and/or colonization due to Pseudomonas aeruginosa in a Brazilian general hospital. In 1966, 1968, and 1969, there were only two instances where probable cross-contamination was shown; the remaining isolates were unrelated. In late 1971 the hospital experienced a marked increase in P. aeruginosa isolation. Contaminated dextrose solutions used in the infant feeding were the apparent cause of the problem which occurred in the premature and special care nurseries. A contaminated oxygen humidifying bottle was the source of a different outbreak in surgery. There was also evidence in four instances that cross-infection and/or contamination had occurred. Pyocin and serological typing revealed that many strains were involved and led to a clear understanding of the complex epidemiological relationships among all the strains.

Papel epidemiologico dos portadores saos de Staphylococcus Aureus como fonte de infeccao. / Epidemiologic role of healthy carriers of Staphylococcus aureus as source of infection

Neste estudo, procuramos verificar o possivel papel epidemiologico por portadores saos de Staphylococcus aureus isoladas da cavidade nasal e orofaringe de profissionais da saude, aparentemente sem afeccao das vias aereas superiores e 34 amostras isoladas de casos consecutivos de infeccao estafilococica hospitalar, ocorridos no mes imediatamente anterior e no mes imediatamente posterior a colheita do material de portadores. Os dados comparativos da fagotipagem das amostras de ambas as colecoes parecem comprovar a importancia dos portadores saos entre o pessoal de saude, como uma possivel fonte de infeccao