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Significance of antibody coated bacteria in neurogenic bladder cases.

A total of 85 urine samples from 63 patients with neurogenic bladder, were subjected for pus cell counting and culture. Fifty nine (69.4%) samples showing significant bacterial growth were tested for the presence of antibody coated bacteria (ACB). One serum sample per patient was collected for the estimation of C-reactive protein. E. coli was the commonest bacterial isolate (45.8%) from the clinical samples followed by Ps. aeruginosa (20.3%) and K. pneumoniae (18.6%). Thirty two culture positive samples belonging to 27 patients, were found to be antibody coated. Of all the isolates, K. pneumoniae was antibody coated in higher proportion (63.7%) followed by Ps. aeruginosa (58.3%) and E. coli (55.6%). Immunoglobulin G was found in all the ACB positive samples, where as 87.5% of them were also coated with IgA class of antibodies. All patients with ACB in urine had raised serum CRP levels except one, where as all the rest of the patients had CRP level within normal limit. The presence of pus cells in urine and radiological abnormalities in the urinary tract were significantly higher in ACB positive patients than in ACB negative patients.