aeruginosa strains that were isolated from the lungs of CF patients have mucoid colony
morphology, and this morphology is more common in the strains isolated from patients in the advanced stages of CF [3, 13].
aeruginosa citrate positive, motile, indole negative, urease negative, lactose non-fermenting, hydrogen sulphide negative, gas negative Gram-negative bacilli, catalase positive, oxidase negative, mucoid colony
, nonmotile, urease positive, K.
A culture was performed on Sabouraud's Dextrose Agar (SDA), which yielded mucoid colony
. Urease test was performed and found positive.
The characteristic smooth, raised and mucoid colony
with typical 'metallic sheen' was considered to be Escherichia coli and was confirmed by biochemical tests viz., Indole, Methylred, Voges proskaeur and citrate utilization.
The etiology of poststreptococcal glomerulonephritis remains speculative, with current theories focusing on the organism's mucoid colony
form and toxin production, individual patient susceptibility, and possible shared epitopes with the kidney, leading to autoimmune injury. The classic histology with glomerular deposition of IgG, C3, C4, and fibrin supports the latter.