Detection of classic and invasive E. coli and Shigella serotypes in stools by indirect immunofluorescence

• Published in: Revista do Instituto de Medicina Tropical de São Paulo
• Main Authors: Waldely de Oliveira Dias, Octávio Augusto de Carvalho Pereira
• Format: Article in Journal/Newspaper
• Language: English
• Published: Universidade de São Paulo (USP) 1984
• Subjects: Arctic medicine. Tropical medicine; RC955-962; Infectious and parasitic diseases; RC109-216; Arctic
• Online Access: https://doi.org/10.1590/S0036-46651984000600002; https://doaj.org/article/b98be0d12b0340b1aa3a0271145144bc

IIF in the detection of invasive and classic enteropathogenic E. coli and Shigella serotypes was compared with traditional coproculture methods. IIP results agreed with the coproculture findings in 128 out of 140 cases tested for enteropathogenic E. coli (91%) and in 108 out of 112 for Shigella (96%). All cases with positive reactions by coproculture were confirmed by IIP. In the control group it were obtained by IIF 12 cases with positive reactions for enteropathogenic E. coli and 4 cases for Shigella, including two cases of mixed infection by E. coli 026/Sh. dysenteriae and E. coli 0124/Sh. dysenteriae. It was discussed the high sensitivity and specificity of the IIF when compared with the traditional methods, being suggested that IIF is a valuable tool in epidemiological studies involving these organisms and an important aid in the stablishment of an early presumptive diagnosis of the acute infantile diarrhea.