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Efficiency of Nested-Pcr in Detecting Asymptomatic Cases Toward Malaria Elimination Program in an Endemic Area of Iran



Turki H1, 2 ; Raeisi A3 ; Malekzadeh K2 ; Ghanbarnejad A4 ; Zoghi S5 ; Yeryan M1 ; Abedi Nejad M2 ; Mohseni F2 ; Shekari M2
Authors
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Authors Affiliations
  1. 1. Infectious and Tropical diseases, Research Center Hormozgan University of Medical Sciences, Bandar Abbas, Iran
  2. 2. Molecular Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
  3. 3. National Programme Manager for Malaria Control, Ministry of Health and Medical Education, Tehran, Iran
  4. 4. Social Determinants in Health Promotion Research Center, Hormozgan University of Medical Sciences, Bandar-Abbas, Iran
  5. 5. Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran

Source: Iranian Journal of Parasitology Published:2015

Abstract

Background: The aim of this study was to detect low parasite and asymptomatic malaria infections by means of three malaria diagnostic tests, in a low transmission region of Minab district, Hormozgan Province, southern Iran. Methods: Blood samples of 200 healthy volunteers from Bagh-e-Malek area were evaluated using microscopic, rapid diagnostic tests (RDT) and nested-PCR to inspect malaria parasite. Results: The results showed no Plasmodium parasite in subjects by means of microscopy and RDT. However, 3 P. vivax positive samples (1.5%) were discovered by Nested-PCR while microscopy and RDT missed the cases. Conclusion: Microscopy as the gold standard method and RDT correctly identified 98.5% of cases, and molecular analysis is sensitive and reliable, especially in the detection of asymptomatic infections for active case surveillance. Regarding the existence of asymptomatic malaria in endemic area of Hormozgan, Iran, nested- PCR could be considered as a sensitive tool to interrupt malaria transmission in the country, beside the microscopic and RDT methods. © 2015, Iran J Parasitol. All Rights Reserved.