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. 1988 Jun;26(6):1161–1165. doi: 10.1128/jcm.26.6.1161-1165.1988

Evaluation of an immunofluorescent-antibody test for rapid identification of Pseudomonas aeruginosa in blood cultures.

G W Counts 1, R W Schwartz 1, B K Ulness 1, D J Hamilton 1, M J Rosok 1, M D Cunningham 1, M R Tam 1, R P Darveau 1
PMCID: PMC266554  PMID: 3133390

Abstract

An immunofluorescent-antibody test was developed for rapid detection of Pseudomonas aeruginosa in blood cultures. The test uses a murine monoclonal antibody specific for all strains of P. aeruginosa. In initial tests, bright uniform immunofluorescence signals were seen when each of the 17 international serotypes, as well as 14 additional isolates of P. aeruginosa, were examined. No immunofluorescent staining was observed when 37 other gram-negative and 15 gram-positive species were studied. In a clinical study, the assay was applied to broth smears of 86 gram-negative bacilli isolated from 74 bacteremic patients and 28 additional clinical isolates of Pseudomonas sp. and other oxidase-positive gram-negative bacilli recovered from various body sites. Smears were made directly from blood cultures which were positive for gram-negative bacilli by Gram staining. Eleven (15%) of 74 patients with gram-negative bacteremia had a positive test for P. aeruginosa. Including the results of these 11 isolates recovered in a prospective study and an additional 10 isolates from a retrospective study, we obtained a sensitivity and specificity of 100% (21 positive specimens and 103 negative specimens, respectively). These preliminary results suggest that this is a useful reagent for rapid presumptive identification of P. aeruginosa in blood cultures. With the immunofluorescent-antibody test, P. aeruginosa could be identified within 1 h of Gram stain evidence of gram-negative bacteremia.

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Selected References

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