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The Mixed AII and BIII Genotypes of Human Giardia lamblia Isolate Circulating in Mazandaran Province, Northern Iran

Author(s):

Elham Kialashaki , Mahdi Fakhar*, Mehdi Sharif *, Ahmad Daryani and Reza Saberi   Pages 1 - 6 ( 6 )

Abstract:


Objectives: Giardiasis is one of the human parasitic diseases by a flagellate protozoan named Giardia lamblia. This parasite is one of the most common organisms causing diarrhea in human and a common gastrointestinal parasite in vertebrates. The purpose of this investigation was to determine the molecular epidemiology of Giardia lamblia (G.lamblia) by PCR-RFLP method in the Mazandaran Province and to investigate possible relationship between parasite genotype and clinical symptoms.

Methods: In this study, 50 stool samples were collected from human cases of G. lamblia. referred to health centers in Sari, Babol, Nowshahr cities. The samples were examined by formalin-ether concentration procedure. DNA extraction was carried out on samples containing adequate Giardia cysts, and then PCR-RFLP was done on glutamate dehydrogenase (gdh) marker.

Results: In these patients, the most common signs were abdominal pain (42.9%), diarrhea (47.6%) and least marked common signs was malaise (4.7%). Of all 21 isolates, 9 samples (42.8%) were found as genotype mixed AII and BIII, 6 samples (28.6%) belonged to genotype BIII and 6 ones (28.6%) were genotype AII. Additionally, there was a significant correlation between AII genotype and clinical symptoms (P <0.05). According to the statistical tests there was a significant relation between abdominal pain and intensity of infection (P<0.05).

Conclusion: However, genotype AII and mixed AII and BIII genotypes were more common respectively. The relatively high prevalence of mixed infection of these genotypes indicated the potential of zoonotic source of giardiasis among patients in Mazandaran Province.

Keywords:

Giardia lamblia, Genotype, Human, A and B genotypes, Iran

Affiliation:

Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Toxoplasmosis Research Center, Department of Parasitology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Toxoplasmosis Research Center, Department of Parasitology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Toxoplasmosis Research Center, Department of Parasitology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari



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