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Sri W. Dwintasari
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Medicine & Pharmacology

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Detection of Cryptosporidium sp infection by PCR and modified acid fast staining from potassium dichromate preserved stool Kurniawan, Agnes; Dwintasari, Sri W.; Soetomenggolo, Herbowo A.; Wanandi, Septelia I.
Medical Journal of Indonesia Vol 18, No 3 (2009): July-September
Publisher : Faculty of Medicine Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.766 KB) | DOI: 10.13181/mji.v18i3.354

Abstract

Aim To identify the frequency of Cryptosporidium infection in children below 3 years old by examining concentrated long term preserved stool using PCR detection of 18S rRNA gene and compared with modified acid fast staining technique.Methods Hundred eighty eight stools from children ≤ 3 years old were stored for 13 months in 2.5% K2Cr2O7 solution at 40C. Cryptosporidium oocysts were isolated by water-ether concentration technique. The concentrates were smeared onto object glass and stained with modified acid fast staining, and the rest of the concentrates were DNA extracted by freezing and thawing cycles and proteinase K digestion, then direct PCR was done to detect 18S rRNA gene.Result The proportion of positive stools for Cryptosporidium sp by acid fast staining from concentrated stools and 18S rRNA PCR were 4.8% and 34.6% respectively, which showed statistically significant difference.Conclusion The frequency of Cryptosporidium infection among children ≤ 3 years old was very high and stool storage in K2Cr2O7 for 13 months did not affect the PCR result. High prevalence of Cryptosporidium infection indicated high transmission in that area and the potential to be transmitted to other individuals such as the immunocompromised. (Med J Indones 2009;18:147-52)Key words: 18S rRNA, cryptosporidiosis
Co-Authors Agnes Kurniawan Herbowo A. Soetomenggolo Septelia I. Wanandi