Abstract:
Purpose:The flavohemoprotein (gFlHb) in Giardia plays an important role in managing nitrosative and oxidative stress, and potentially also in virulence and nitroimidazole drug tolerance. The aim of this study was to analyze the genetic diversity of gFlHb in Giardia assemblages A and B clinical isolates. Methods:gFlHb genes from 20 cultured clinical Giardia isolates were subjected to PCR amplification and cloning, followed by Sanger sequencing. Sequences of all cloned PCR fragments from each isolate were analyzed for single nucleotide variants (SNVs) and compared to genomic Illumina sequence data. Identical clone sequences were sorted into alleles, and diversity was further analyzed. The number of gFlHb gene copies was assessed by mining PacBio de novo assembled genomes in eight isolates. Homology models for assessment of SNV's potential impact on protein function were created using Phyre2. Results:A variable copy number of the gFlHb gene, between two and six copies, depending on isolate, was found. A total of 37 distinct sequences, representing different alleles of the gFlHb gene, were identified in AII isolates, and 41 were identified in B isolates. In some isolates, up to 12 different alleles were found. The total allelic diversity was high for both assemblages (>0.9) and was coupled with a nucleotide diversity of <0.01. The genetic variation (SNVs per CDS length) was 4.8% in sub-assemblage AII and 5.4% in assemblage B. The number of non-synonymous (ns) SNVs was high in gFIHb of both assemblages, 1.6% in A and 3.0% in B, respectively. Some of the identified nsSNV are predicted to alter protein structure and possibly function. Conclusion:In this study, we present evidence that gFlHb, a putative protective enzyme against oxidative and nitrosative stress in Giardia, is a variable copy number gene with high allelic diversity. The genetic variability of gFlHb may contribute metabolic adaptability against metronidazole toxicity.
journal_name
Infect Drug Resistjournal_title
Infection and drug resistanceauthors
Saghaug CS,Klotz C,Kallio JP,Aebischer T,Langeland N,Hanevik Kdoi
10.2147/IDR.S274543subject
Has Abstractpub_date
2020-12-18 00:00:00pages
4531-4545issn
1178-6973pii
274543journal_volume
13pub_type
杂志文章abstract:Background:China is facing a great challenge of pulmonary nontuberculous mycobacteria (NTM) infections. This primary objective of this study was to assess the prevalence of NTM isolates among patients with presumptive TB in Fujian. Methods:The mycobacterial isolates were collected from the tuberculosis survey from Fuj...
journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S223828
更新日期:2019-11-12 00:00:00
abstract:Background:Bloodstream infection (BSI) caused by carbapenem-resistant Enterobacteriaceae are potentially life-threatening related to poorer outcomes. Colistin is considered one of the last-resort treatments against human infections caused by multidrug-resistant (MDR) Gram-negative bacteria. Therefore, emergence of stra...
journal_title:Infection and drug resistance
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journal_title:Infection and drug resistance
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更新日期:2019-11-29 00:00:00
abstract:Background:The prevalence of Helicobacter pylori resistance to metronidazole and clarithromycin is high in Indonesia. Moreover, the increasing levofloxacin resistance rates in the absence of bismuth treatment in Indonesia has led to the use of other antibiotics as alternative regimens. Methods:We determined the minimu...
journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S187063
更新日期:2019-01-31 00:00:00
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journal_title:Infection and drug resistance
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journal_title:Infection and drug resistance
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doi:10.2147/IDR.S162135
更新日期:2018-10-11 00:00:00
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journal_title:Infection and drug resistance
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doi:10.2147/IDR.S169789
更新日期:2018-08-10 00:00:00
abstract::Mycoplasma genitalium is one of the important causes of non-gonococcal urethritis. Rising incidence and emerging antimicrobial resistance are a major concern these days. The poor clinical outcomes with doxycycline therapy led to the use of azithromycin as the primary drug of choice. Single-dose azithromycin regimen ov...
journal_title:Infection and drug resistance
pub_type: 杂志文章,评审
doi:10.2147/IDR.S105469
更新日期:2017-09-01 00:00:00
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journal_title:Infection and drug resistance
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doi:10.2147/IDR.S272605
更新日期:2020-10-05 00:00:00
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journal_title:Infection and drug resistance
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doi:10.2147/IDR.S145827
更新日期:2017-12-22 00:00:00
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journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S29113
更新日期:2012-01-01 00:00:00
abstract:INTRODUCTION:In recent decades, antimicrobial resistance has become a public health problem, particularly in cases of healthcare-associated infections. Interaction between antibiotic consumption and resistance development is of particular interest regarding Gram-negative bacilli, whose growing resistance has represente...
journal_title:Infection and drug resistance
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doi:10.2147/IDR.S22491
更新日期:2011-01-01 00:00:00
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journal_title:Infection and drug resistance
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更新日期:2020-03-23 00:00:00
abstract:Purpose:To investigate the occurrence and genetic characteristics of the blaIMP-26-positive plasmid from a multidrug-resistant clinical isolate, Enterobacter hormaechei L51. Methods:Species identification was determined by MALDI-TOF MS and Sanger sequencing. Antimicrobial susceptibility testing was performed by the ag...
journal_title:Infection and drug resistance
pub_type: 杂志文章
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更新日期:2020-02-20 00:00:00
abstract::Purpose: To investigate antimicrobial resistance and risk factors for mortality of Klebsiella pneumoniae (KP) pneumonia in diabetics and nondiabetics. Patients and methods: A retrospective study was conducted among inpatients of KP pneumonia via electronic medical records in a territory hospital between January 2016 a...
journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S199642
更新日期:2019-05-07 00:00:00
abstract:INTRODUCTION:The characteristics and antimicrobial resistance profiles of Staphylococcus aureus differs according to geographical regions and in relation to antibiotic usage. The aim of this study was to determine the biochemical characteristics of the prevalent S. aureus from Ekiti State, Nigeria, and to evaluate thre...
journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S48809
更新日期:2013-08-20 00:00:00
abstract::The increase in hospitalization due to acute bacterial skin and skin structure infections (ABSSSI) caused by resistant pathogens supports the need for new treatment options. Antimicrobial options for ABSSSI that provide broad-spectrum coverage, including gram-negative pathogens and multidrug-resistant gram-positive ba...
journal_title:Infection and drug resistance
pub_type: 杂志文章,评审
doi:10.2147/IDR.S142140
更新日期:2018-04-04 00:00:00
abstract:Background:Staphylococcus aureus is among the most common causes of health care- and community-associated infections worldwide. The distributions of different S. aureus clones change over time and also vary geographically. The purpose of this study was to determine the molecular type and antimicrobial resistance profil...
journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S202906
更新日期:2019-06-20 00:00:00
abstract:Backgrounds:The aim of this study was to evaluate both phenotypic and genotypic determinants of mupirocin resistance among methicillin-resistant Staphylococcus aureus (MRSA) and methicillin susceptible S. aureus (MSSA) strains recovered from different clinical samples of children who were admitted to the Children's Med...
journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S185610
更新日期:2019-01-03 00:00:00
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journal_title:Infection and drug resistance
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更新日期:2018-01-09 00:00:00
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journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S225288
更新日期:2019-12-05 00:00:00
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journal_title:Infection and drug resistance
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更新日期:2019-05-27 00:00:00
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journal_title:Infection and drug resistance
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更新日期:2019-06-21 00:00:00
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journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S277890
更新日期:2020-10-27 00:00:00
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doi:10.2147/IDR.S253363
更新日期:2020-06-10 00:00:00
abstract:Background:Hepatitis E virus (HEV) is an emerging infectious agent that causes acute hepatitis in developing and developed countries. Diagnosis of HEV infection has not been routinely done in Egyptian hospitals, and clinicians do not prescribe ribavirin (RBV) for acute hepatitis cases of unknown etiology (AHUE). We aim...
journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S289766
更新日期:2021-01-12 00:00:00
abstract::Infections due to multidrug-resistant Gram-negative bacteria (MDR-GNB), especially when carbapenem resistant, have been very difficult to manage in the last fifteen years, owing to the paucity of dependable therapeutic options. Cefiderocol is a siderophore cephalosporin recently approved by the Food and Drug Administr...
journal_title:Infection and drug resistance
pub_type: 杂志文章,评审
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更新日期:2020-12-29 00:00:00
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journal_title:Infection and drug resistance
pub_type: 杂志文章
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更新日期:2020-08-12 00:00:00
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journal_title:Infection and drug resistance
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更新日期:2020-09-14 00:00:00
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journal_title:Infection and drug resistance
pub_type: 杂志文章
doi:10.2147/IDR.S226154
更新日期:2020-02-13 00:00:00