Differentiation of Entamoeba histolytica/Entamoeba dispar by the polymerase chain reaction in stool samples of patients with gastrointestinal symptoms in the Şanliurfa province
Küçük Resim Yok
Tarih
2013
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Amaç: Çalışmamızda, endemik bir bölgede olan Şanlıurfa’da gastrointestinal semptomları olan hastalarda amebiazisin tanısı ve Entamoeba histolytica (E. histolytica) ve Entamoeba dispar (E. dispar) tanımlanmasını amaçladık. Yöntemler: Şanlıurfa’da gastrointestinal semptomu olan 181 hastadan toplanan dışkı örnekleri amebiazis tanısı için aşağıda belirtilen 3 yöntemle incelenmişlerdir: E. histolytica/E. dispar ayıran “small-subunit (SSU) rRNA gen” bölgesinde yerleşen 135 bazlık bölgenin hedeflendiği in house PCR, Entamoeba sensu lato antijenini gösteren ticari kit RIDASCREEN® stool ELISA ve Trichrome boyama ile mikroskobik inceleme yöntemleri. Bulgular: Yüz seksen bir dışkı örneğinin 83’ü (%45,9) PCR ile ve 79’u (%43,6) mikroskobi ile E. histolytica/E. dispar pozitif bulunmuştur. Kırk beş hasta, antijen saptama yöntemi ile pozitif bulunmuştur. Elli dokuz örnek ise PCR ve mikroskobi birlikte pozitif tespit edilmiştir. E. dispar (%39,8) ile enfekte bulunan hastaların sayısı, E. histolytica (%3,3) ile enfekte olanlara göre fazla bulunmuştur. Beş hastada (%2,8) ise PCR ile E. histolytica+E. dispar mix enfeksiyonu saptanmıştır. Sonuç: Amebiazisin rutin tanısında mikroskobi ve antijen saptama yöntemlerinin yanı sıra, her iki türün hassas olarak ayırımı için referans test olarak PCR’ın uygulanması önerilmektedir.
Objective: We aimed to diagnose amebiasis and also identify Entamoeba histolytica (E. histolytica) and Entamoeba dispar (E. dispar) in patients with gastrointestinal symptoms in an endemic region in Turkey. Methods: Stool samples obtained from 181 patients with gastrointestinal symptoms from the Harran University Hospital of Sanliurfa were examined for the diagnosis of amebiasis by the three methods which are as follows:- In house polymerase chain reaction (PCR) targeting the 135 base pair region located on the small-subunit ribosomal RNA (SSU rRNA) gene to differentiate E. histolytica from E. dispar; and the commercial kit, RIDASCREEN® stool ELISA, that identifies Entamoeba sensu lato antigen and microscopical examination of Trichrome stained smears of stool samples. Results: Positivity for E. histolytica/E. dispar complex was found to be 79 (43.6%) by microscopy versus 83 (45.9%) by PCR out of 181 stool samples. A total of 45 patients were found to be positive by the antigen detection method. PCR and microscopy were both positive in 59 samples. The number of patients infected with E. dispar (39.8%) was found to be higher than E. histolytica (3.3%) while 5 patients (2.8%) had mixed E. histolytica+E. dispar infections according to PCR results. Conclusion: Routine diagnosis of amebiasis by a combination of microscopy and antigen detection technique should be complemented with a PCR assay as a reference test for sensitive differentiation of both species.
Objective: We aimed to diagnose amebiasis and also identify Entamoeba histolytica (E. histolytica) and Entamoeba dispar (E. dispar) in patients with gastrointestinal symptoms in an endemic region in Turkey. Methods: Stool samples obtained from 181 patients with gastrointestinal symptoms from the Harran University Hospital of Sanliurfa were examined for the diagnosis of amebiasis by the three methods which are as follows:- In house polymerase chain reaction (PCR) targeting the 135 base pair region located on the small-subunit ribosomal RNA (SSU rRNA) gene to differentiate E. histolytica from E. dispar; and the commercial kit, RIDASCREEN® stool ELISA, that identifies Entamoeba sensu lato antigen and microscopical examination of Trichrome stained smears of stool samples. Results: Positivity for E. histolytica/E. dispar complex was found to be 79 (43.6%) by microscopy versus 83 (45.9%) by PCR out of 181 stool samples. A total of 45 patients were found to be positive by the antigen detection method. PCR and microscopy were both positive in 59 samples. The number of patients infected with E. dispar (39.8%) was found to be higher than E. histolytica (3.3%) while 5 patients (2.8%) had mixed E. histolytica+E. dispar infections according to PCR results. Conclusion: Routine diagnosis of amebiasis by a combination of microscopy and antigen detection technique should be complemented with a PCR assay as a reference test for sensitive differentiation of both species.
Açıklama
Anahtar Kelimeler
Parazitoloji, Genel ve Dahili Tıp
Kaynak
Türkiye Parazitoloji Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
37
Sayı
3
