Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases
-
Infect. Genet. Evol. · Sep 2019
Single-nucleotide polymorphisms in Toll-like receptor genes are associated with the prognosis of gastric cancer and are not associated with Helicobacter pylori infection.
Toll-like receptors (TLRs) mediate the recognition of Helicobacter pylori (H. pylori) and initiate the innate immune response to infection. Genetic polymorphisms of TLRs play important roles in gastric carcinogenesis. The aim of this study was to determine the association between single nucleotide polymorphisms (SNPs) in TLR genes and H. pylori infection in the prognosis of gastric cancer (GC). ⋯ Multivariate Cox regression indicated that patients with the TLR2 rs3804100 TT genotype exhibited worse survival than those with the CC + CT genotype (HR = 1.262, 95% CI: 1.006-1.582). No significant interaction between rs3804100 and H. pylori infection was observed for the prognosis of GC. Our results suggested that the TLR2 rs3804100 polymorphism may be a potential prognostic biomarker for GC independent of the H. pylori infection-related pathway.
-
Infect. Genet. Evol. · Aug 2019
ReviewImproving diagnosis and case management of patients with tuberculosis: A review of gaps, needs and potential solutions in accessing laboratory diagnostics.
Tuberculosis (TB) recently surpassed HIV/AIDS as the deadliest infectious disease. Despite some advancements in technologies and programs, TB remains a global health epidemic that, without significant gains in better diagnostic and management, will not abate. This review describes the molecular diagnostic gaps, needs, and potential solutions for improving access to diagnosis and management of patients with drug susceptible and drug resistant TB. ⋯ Closing these gaps will enable national programs to more efficiently diagnose TB, monitor treatment efficacy, and control drug resistance. Prioritization is based on technologies that address facilitate a more patient-centered approach, and are appropriate for low-resource and high-burden TB settings. New diagnostics must complement current or anticipated developments elsewhere and accelerate increased coverage, quality, and impact at the lower levels of the healthcare system.
-
Infect. Genet. Evol. · Jul 2019
Detection of rifampicin resistance of Mycobacterium tuberculosis using multiplex allele specific polymerase chain reaction (MAS-PCR) in Pakistan.
Drug resistance in tuberculosis (TB) is a major public health challenge in developing countries such as Pakistan. Multiplex allele specific polymerase chain reaction (MAS-PCR) is a DNA amplification method that could contribute to rapid detection and control of drug resistant tuberculosis (DR-TB) in Pakistan. The purpose of this study was to test the utility of MAS-PCR to detect resistance in Pakistan. ⋯ Moreover, a mutation in rpoB (Leu452Pro) was found in 5 isolates. DNA sequencing confirmed the absence of mutations in rpoB in the 8 remaining isolates. MAS-PCR had 88.3% sensitivity and 100% specificity using DST as the reference, which suggested that this method could be implemented as an initial marker for screening of multi-drug resistant tuberculosis (MDR-TB) in Pakistan.
-
Infect. Genet. Evol. · Dec 2018
Recent trends in molecular epidemiology of Hepatitis C virus in Mardan, KPK Pakistan.
To determine the genotypic distribution of HCV, frequency of risk factors involved in its transmission, and correlation of genotype with viral load in Mardan population which is the second largest city of Khyber Pakhtunkhwa (KPK), Pakistan. Blood samples of 1140 were collected from different regions of Mardan and major proportion of recruited patients were internally displaced people (IDPs), refugees, and slum dwellers. Complete patient's history was analyzed to assess the possible risks involved in HCV transmission. ⋯ This study gives clear insights into the epidemiological status of HCV in Mardan population. Genotype 3 is correlated with low and intermediate viral load whereas high viral loads were revealed among patients infected with genotypes other than genotype 3. In the absence of better data and robust epidemiological information, this detailed analysis of HCV genotypes with special reference to risk factors, pretreatment viral load, gender, and age will provide the baseline data for development of optimal HCV eradication and preventive strategies.
-
Infect. Genet. Evol. · Oct 2018
Molecular epidemiology of hepatitis delta and hepatitis B viruses circulating in two major provinces (East and North-West) of Pakistan.
HBV and HDV are major public health problems with millions affected globally and Pakistan accounts for a significant proportion of the global Hepatitis burden. This cross sectional study was designed to assess the general epidemiological and virological features of HBV and HDV in the Punjab and Khyber Pakhtunkhawa (KP) provinces of Pakistan. ⋯ The prevalence of HBV and HDV is high in Pakistan. The description of HBV and HDV genotypes circulating in East and North-West Pakistan can contribute to a better understanding of their relevance in regional epidemics. These infections are highly endemic in the KP, where their control is confounded by its vast territorial dimension with small, hard-to-reach municipalities and diverse ethnic populations.