Farzad Mahdavi, Mohammad Reza Mohammadi, Kambiz Karimi, Laya Shamsi, Farajolah Maleki, Ali Asghari, Saeed Shahabi, Mohammad Hossein Motazedian, Hassan Nourmohammadi
{"title":"Clinical Manifestations and Molecular Identification of <i>Giardia duodenalis</i> in Pediatric and Adolescent Cancer Patients in Southwestern Iran.","authors":"Farzad Mahdavi, Mohammad Reza Mohammadi, Kambiz Karimi, Laya Shamsi, Farajolah Maleki, Ali Asghari, Saeed Shahabi, Mohammad Hossein Motazedian, Hassan Nourmohammadi","doi":"10.1089/fpd.2024.0100","DOIUrl":null,"url":null,"abstract":"<p><p>This study aimed to investigate the clinical and molecular characteristics of <i>Giardia duodenalis</i> (<i>G. duodenalis</i>) infection and identify potential risk factors in children and teenagers with malignancies in Shiraz, southwestern Iran. A total of 200 fresh fecal samples were collected from children and adolescents suffering from 32 different cancer types at Amir, Nemazee, and Saadi hospitals affiliated with Shiraz University of Medical Sciences between October 2021 and May 2022. Direct microscopy using saline and iodine wet mount was conducted, and all fecal samples were rechecked by <i>SSU</i>-PCR. Subsequently, a specific fragment of the <i>tpi</i> gene was amplified on all samples for prevalence, sequencing, and assemblage identification. Our study found a 4% (8/200) prevalence of <i>G. duodenalis</i> using microscopy and PCR. The molecular findings were consistent with the microscopic results. All eight positive samples with <i>SSU-rRNA</i> gene were also detected as positive with <i>tpi</i> gene and were correctly sequenced. Among the examined cancer patients, two assemblages were identified: A [sub-assemblage AI (2/8, 25%) and sub-assemblage AII (3/8, 37.5%)] and B [sub-assemblage BIV (3/8, 37.5%)]. Notably, patients were more vulnerable to <i>G. duodenalis</i> infection after receiving at least 8 treatment episodes (<i>p</i> < 0.05) and displaying gastrointestinal symptoms (<i>p</i> > 0.05). The demographic characteristics of cancer patients with <i>G. duodenalis</i> infection and the statistical conclusions were separately detailed. The small sample size and low prevalence rate in this study hindered precise epidemiological conclusions. Nonetheless, the results suggest that <i>G. duodenalis</i> infection among cancer patients in Shiraz city originates from humans, without any specific animal groups (C-H) involved.</p>","PeriodicalId":12333,"journal":{"name":"Foodborne pathogens and disease","volume":" ","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Foodborne pathogens and disease","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1089/fpd.2024.0100","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"FOOD SCIENCE & TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
This study aimed to investigate the clinical and molecular characteristics of Giardia duodenalis (G. duodenalis) infection and identify potential risk factors in children and teenagers with malignancies in Shiraz, southwestern Iran. A total of 200 fresh fecal samples were collected from children and adolescents suffering from 32 different cancer types at Amir, Nemazee, and Saadi hospitals affiliated with Shiraz University of Medical Sciences between October 2021 and May 2022. Direct microscopy using saline and iodine wet mount was conducted, and all fecal samples were rechecked by SSU-PCR. Subsequently, a specific fragment of the tpi gene was amplified on all samples for prevalence, sequencing, and assemblage identification. Our study found a 4% (8/200) prevalence of G. duodenalis using microscopy and PCR. The molecular findings were consistent with the microscopic results. All eight positive samples with SSU-rRNA gene were also detected as positive with tpi gene and were correctly sequenced. Among the examined cancer patients, two assemblages were identified: A [sub-assemblage AI (2/8, 25%) and sub-assemblage AII (3/8, 37.5%)] and B [sub-assemblage BIV (3/8, 37.5%)]. Notably, patients were more vulnerable to G. duodenalis infection after receiving at least 8 treatment episodes (p < 0.05) and displaying gastrointestinal symptoms (p > 0.05). The demographic characteristics of cancer patients with G. duodenalis infection and the statistical conclusions were separately detailed. The small sample size and low prevalence rate in this study hindered precise epidemiological conclusions. Nonetheless, the results suggest that G. duodenalis infection among cancer patients in Shiraz city originates from humans, without any specific animal groups (C-H) involved.
期刊介绍:
Foodborne Pathogens and Disease is one of the most inclusive scientific publications on the many disciplines that contribute to food safety. Spanning an array of issues from "farm-to-fork," the Journal bridges the gap between science and policy to reduce the burden of foodborne illness worldwide.
Foodborne Pathogens and Disease coverage includes:
Agroterrorism
Safety of organically grown and genetically modified foods
Emerging pathogens
Emergence of drug resistance
Methods and technology for rapid and accurate detection
Strategies to destroy or control foodborne pathogens
Novel strategies for the prevention and control of plant and animal diseases that impact food safety
Biosecurity issues and the implications of new regulatory guidelines
Impact of changing lifestyles and consumer demands on food safety.