John P. Manzella

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A single blood culture inoculated with a small volume of blood is still frequently being used for the diagnosis of bacteremia in children because of the continued belief by many that bacteria are usually found in high concentrations in the blood of pediatric patients with sepsis. To determine the importance of both blood volume cultured and the number of(More)
The efficiency of the 10-ml Isolator (E. I. du Pont de Nemours & Co., Inc.) for recovery of pathogens from blood was compared with that of BACTEC 6B and 7C media (Johnston Laboratories) by using 4,195 cultures from 1,662 patients. During the first phase of the study, BACTEC bottles were inoculated with 3 ml of blood; in the second phase, bottles were(More)
The use of screens to detect "significant levels" of pathogenic microorganisms in urine specimens offers the advantages of both rapidly reporting results and controlling costs. Many of these screens, however, are insensitive at microbial counts below 10(5) colony-forming units (CFU)/ml of urine. It is increasingly apparent that patients with almost any type(More)
Much controversy has existed concerning the clinical significance of small numbers of group A streptococci (eg, one to ten or even 50 colonies) recovered in culture. The relative quantity of streptococci recovered is, in part, technique dependent. This review documents the need for sensitive throat culture technology, addresses technical problems associated(More)
Corynebacterium pseudodiphtheriticum has been reported to be an uncommon respiratory pathogen. We describe the clinical and microbiologic features of 17 patients from whose sputum C. pseudodiphtheriticum was isolated. Patients were identified through a review of the reports from the clinical microbiology laboratory at York Hospital, a community teaching(More)
The effects of several quinolone compounds on mitogen-stimulation of normal human mononuclear leucocytes were studied. In these experiments, mononuclear leucocytes were obtained from heparinized whole blood of healthy young adult donors by Ficoll-hypaque sedimentation. The cells were cultured in the presence of both mitogen and various concentrations of the(More)
Trichosporon beigelii fungemia and multiple, purpuric, papular skin lesions developed on the chest wall and extremities of a 22-year-old man with acute granulocytic leukemia. Histologically, the skin lesions demonstrated dermal budding yeasts, which were identified as T beigelii in culture. Unexplained biventricular, congestive heart failure and sepsis wit(More)