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. 1970 Oct;2(4):495–503. doi: 10.1128/iai.2.4.495-503.1970

Agar-Gel Precipitating Antibody in Pseudomonas aeruginosa Infections

Lowell S Young a,1, Bessie H Yu a, Donald Armstrong a
PMCID: PMC416039  PMID: 16557868

Abstract

The human immune response to Pseudomonas aeruginosa infection was studied by using the double diffusion in agar-gel technique. Antigens from Fisher-Devlin-Gnabasik immunotypes were prepared by both trichloroacetic acid extraction and ultrasonic disruption. Serum from 72 of 168 patients (43%) from whom P. aeruginosa was isolated formed from one to eight precipitin bands. Precipitins were demonstrated in the sera of 60 of 66 (91%) patients recovering from bacteremia and deep infections; however, they were usually absent when Pseudomonas infection was fatal or when there was no clinical evidence of significant infection. Precipitating antibody was detectable at serum dilutions as high as 1:32, and appearance of single bands correlated with hemagglutinating antibody titers of ≥1:128. Antigen from sonically disrupted organisms usually resulted in stronger precipitin bands than trichloroacetic acid extracts, and antigen from the homologous infecting strain occasionally increased test sensitivity. None of 50 normal controls had Pseudomonas precipitins as was the case in patients convalescing from Escherichia coli (15 patients), Klebsiella-Enterobacter-Serratia (18), and Proteus (14) bacteremias. Measurement of agar-gel precipitins was useful and specific in evaluating the circulating antibody response to P. aeruginosa infections.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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