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Journal of Pathogens

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https://www.readbyqxmd.com/read/29666708/nonphotodynamic-roles-of-methylene-blue-display-of-distinct-antimycobacterial-and-anticandidal-mode-of-actions
#1
Rahul Pal, Moiz A Ansari, Venkata Saibabu, Shrayanee Das, Zeeshan Fatima, Saif Hameed
Significance of methylene blue (MB) in photodynamic therapy against microbes is well established. Previously, we have reported the antifungal potential of MB against Candida albicans . The present study attempts to identify additional antimicrobial effect of MB against another prevalent human pathogen, Mycobacterium tuberculosis (MTB). We explored that MB is efficiently inhibiting the growth of Mycobacterium at 15.62  μ g/ml albeit in bacteriostatic manner similar to its fungistatic nature. We uncovered additional cell surface phenotypes (colony morphology and cell sedimentation rate) which were impaired only in Mycobacterium ...
2018: Journal of Pathogens
https://www.readbyqxmd.com/read/29657865/stress-adaptive-responses-associated-with-high-level-carbapenem-resistance-in-kpc-producing-klebsiella-pneumoniae
#2
Sheila Adams-Sapper, Adam Gayoso, Lee W Riley
Carbapenem-resistant Enterobacteriaceae (CRE) organisms have emerged to become a major global public health threat among antimicrobial resistant bacterial human pathogens. Little is known about how CREs emerge. One characteristic phenotype of CREs is heteroresistance, which is clinically associated with treatment failure in patients given a carbapenem. Through in vitro whole-transcriptome analysis we tracked gene expression over time in two different strains (BR7, BR21) of heteroresistant KPC-producing Klebsiella pneumoniae, first exposed to a bactericidal concentration of imipenem followed by growth in drug-free medium...
2018: Journal of Pathogens
https://www.readbyqxmd.com/read/29593912/antimicrobial-susceptibility-among-colistin-sulbactam-and-fosfomycin-and-a-synergism-study-of-colistin-in-combination-with-sulbactam-or-fosfomycin-against-clinical-isolates-of-carbapenem-resistant-acinetobacter-baumannii
#3
Sombat Leelasupasri, Wichai Santimaleeworagun, Tossawan Jitwasinkul
This in vitro study aimed to determine the activity of colistin plus sulbactam and colistin plus fosfomycin against carbapenem-resistant A. baumannii (CRAB). Fifteen clinical isolates were obtained from patients admitted to Phyathai II International Hospital, Bangkok, Thailand, from August 2014 to April 2015. The antimicrobial susceptibilities of colistin, sulbactam, and fosfomycin were evaluated using the E-test or broth microdilution and the synergistic activity of the antibacterial combinations (colistin plus sulbactam or fosfomycin) was determined using the chequerboard method...
2018: Journal of Pathogens
https://www.readbyqxmd.com/read/29593911/first-report-of-bla-ctx-m-28-in-enterobacteriaceae-isolates-in-the-united-arab-emirates
#4
Mubarak Alfaresi, Garwin Kim Sing, Abiola Senok
Background: The CTX-M family of extended-spectrum beta lactamase (ESBL) enzymes is comprised of over 60 bla CTX-M gene variants with the predominance of bla CTX-M-15 in many regions. In this report, we present the first description of bla CTX-M-28 in the United Arab Emirates. Methods: Forty-five non-duplicate ESBL producing isolates identified in a secondary care facility in the United Arab Emirates from June to July 2016 were studied. Gene sequencing was performed and DNA sequences were annotated using the BLAST program to identify the gene subtypes...
2018: Journal of Pathogens
https://www.readbyqxmd.com/read/29568653/molecular-detection-of-brucella-spp-from-milk-of-seronegative-cows-from-some-selected-area-in-bangladesh
#5
Md Sadequl Islam, Md Ariful Islam, Mst Minara Khatun, Sukumar Saha, Md Samiul Basir, Md-Mahmodul Hasan
Brucellosis is endemic in Bangladesh both in humans and in animals. A number of reasons complicate the diagnosis, as bovine brucellosis can be diagnosed by various serological tests. But the tests have a limitation; when the organism remains intracellular, the disease goes into chronic stage and the antibody titres may decline. The present study was conducted for isolation and detection of Brucella spp. by polymerase chain reaction (PCR) from seronegative cows. A total of 360 dairy cows from three geographical regions were screened serologically by Rose Bengal Plate Test (RBPT) where 24 samples were serologically positive and the rest of the samples were serologically negative...
2018: Journal of Pathogens
https://www.readbyqxmd.com/read/29464124/epstein-barr-virus-as-a-promising-immunotherapeutic-target-for-nasopharyngeal-carcinoma-treatment
#6
REVIEW
Sin-Yeang Teow, Hooi-Yeen Yap, Suat-Cheng Peh
Epstein-Barr virus (EBV) is a pathogen that infects more than 90% of global human population. EBV primarily targets B-lymphocytes and epithelial cells while some of them infect monocyte/macrophage, T-lymphocytes, and dendritic cells (DCs). EBV infection does not cause death by itself but the infection has been persistently associated with certain type of cancers such as nasopharyngeal carcinoma (NPC), Burkitt's lymphoma (BL), and Hodgkin's lymphoma (HL). Recent findings have shown promise on targeting EBV proteins for cancer therapy by immunotherapeutic approach...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29445548/comparison-of-algorithms-for-the-detection-of-enteroviruses-in-stool-specimens-from-children-diagnosed-with-acute-flaccid-paralysis
#7
J A Adeniji, F A Ayeni, A Ibrahim, K A Tijani, T O C Faleye, M O Adewumi
This study was designed to compare both the cell culture dependent and independent enterovirus detection algorithms recommended by the WHO and assess how either might impact our perception of the diversity of enterovirus types present in a sample. Sixteen paired samples (16 isolates from RD cell culture and their corresponding stool suspension, i.e., 32 samples) from AFP cases in Nigeria were analyzed in this study. All the samples were subjected to RNA extraction, cDNA synthesis, the WHO recommended RT-snPCR, and its modification...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29445547/temporal-regulation-of-fim-genes-in-uropathogenic-escherichia-coli-during-infection-of-the-murine-urinary-tract
#8
William R Schwan, Hua Ding
Uropathogenic Escherichia coli (UPEC) adhere to cells in the human urinary tract via type 1 pili that undergo phase variation where a 314-bp fimS DNA element flips between Phase-ON and Phase-OFF orientations through two site-specific recombinases, FimB and FimE. Three fim-lux operon transcriptional fusions were created and moved into the clinical UPEC isolate NU149 to determine their temporal regulation in UPEC growing in the urinary tract. Within murine urinary tracts, the UPEC strains demonstrated elevated transcription of fimA and fimB early in the infection, but lower transcription by the fifth day in murine kidneys...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29435370/analysis-of-aminoglycoside-modifying-enzyme-genes-responsible-for-high-level-aminoglycoside-resistance-among-enterococcal-isolates
#9
Vishal Shete, Naveen Grover, Mahadevan Kumar
Enzymatic modification results in high-level resistance to aminoglycoside (HLAR), which eliminates the synergistic bactericidal effect of combined exposure to a cell wall-active agent and an aminoglycoside. So aim of the study was to determine prevalence of HLAR enterococcal isolate and to study distribution of aminoglycoside modifying enzyme genes in them. A total of 100 nonrepeat isolates of enterococci from various clinical samples were analyzed. As per Clinical and Laboratory Standards Institute guidelines enterococci were screened for HLAR by Kirby-Bauer disc diffusion method...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29410920/novel-genetic-variants-of-hepatitis-b-virus-in-fulminant-hepatitis
#10
Jack Bee Chook, Yun Fong Ngeow, Kok Keng Tee, Suat Cheng Peh, Rosmawati Mohamed
Fulminant hepatitis (FH) is a life-threatening liver disease characterised by intense immune attack and massive liver cell death. The common precore stop codon mutation of hepatitis B virus (HBV), A1896, is frequently associated with FH, but lacks specificity. This study attempts to uncover all possible viral nucleotides that are specifically associated with FH through a compiled sequence analysis of FH and non-FH cases from acute infection. We retrieved 67 FH and 280 acute non-FH cases of hepatitis B from GenBank and applied support vector machine (SVM) model to seek candidate nucleotides highly predictive of FH...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29387489/acute-hepatitis-e-virus-infection-in-two-geographical-regions-of-nigeria
#11
I M Ifeorah, T O C Faleye, A S Bakarey, M O Adewumi, A Akere, E C Omoruyi, A O Ogunwale, J A Adeniji
Hepatitis E virus (HEV) remains a major public health concern in resource limited regions of the world. Yet data reporting is suboptimal and surveillance system is inadequate. In Nigeria, there is dearth of information on prevalence of acute HEV infection. This study was therefore designed to describe acute HEV infection among antenatal clinic attendees and community dwellers from two geographical regions in Nigeria. Seven hundred and fifty plasma samples were tested for HEV IgM by Enzyme Linked Immunosorbent Assay (ELISA) technique...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29318048/evaluation-of-camp-like-effect-biofilm-formation-and-discrimination-of-candida-africana-from-vaginal-candida-albicans-species
#12
Keyvan Pakshir, Mahboubeh Bordbar, Kamiar Zomorodian, Hasti Nouraei, Hossein Khodadadi
Candida africana as a species recovered from female genital specimens is highly close to C. albicans . The present study was conducted to discriminate C. africana from presumptive vaginal C. albicans strains by molecular assay and evaluate their hemolysin activity, biofilm formation, and cohemolytic effect (CAMP) with vaginal bacterial flora. A total of 110 stock vaginal C. albicans isolates were examined by HWP1 gene amplification. Hemolysin activity and the ability of biofilm formation were evaluated by blood plate assay and visual detection methods, respectively...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29250446/a-laboratory-assessment-of-two-local-strains-of-the-beauveria-bassiana-bals-vuill-against-the-tetranychus-urticae-acari-tetranychidae-and-their-potential-as-a-mycopesticide
#13
Serkan Ortucu, Omer Faruk Algur
This study was conducted to assess highly pathogenic Beauveria bassiana isolates to be used in biocontrol and to determine their potentials as mycopesticide. For this purpose, two B. bassiana isolates, which were locally isolated from T. urticae , were chosen. Firstly, three suspensions were investigated at the degree of humidity of 65 ± 5% and 100% RH. Secondly, these strains were selected according to their tendency to mass production, tolerance to UV radiation, and capability of producing spore at the different temperatures...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29225973/molecular-epidemiology-of-rifampicin-resistance-in-mycobacterium-tuberculosis-using-the-genexpert-mtb-rif-assay-from-a-rural-setting-in-india
#14
Raghuprakash Reddy, Gerardo Alvarez-Uria
The Xpert MTB/RIF assay can detect mutations in rpoB gene that confer rifampicin resistance (RR) using five overlapping probes (A, B, C, D, and E). In this study, we described our experience with the Xpert assay in a rural setting in India. During the study period, 3250 samples were processed. The result was unsuccessful in 5.7% of cases. For extrapulmonary specimens, the risk of unsuccessful result was higher in tissue biopsy and stool samples. Among samples positive for Mycobacterium tuberculosis , rifampicin resistance was indeterminate in 1...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/28932604/high-burden-of-antimicrobial-resistance-among-bacteria-causing-pyogenic-wound-infections-at-a-tertiary-care-hospital-in-kathmandu-nepal
#15
Basista Prasad Rijal, Deepa Satyal, Narayan Prasad Parajuli
Pyogenic wound infections are one of the most common clinical entities caused and aggravated by the invasion of pathogenic organisms. Prompt and aggressive antimicrobial therapy is needed to reduce the burden and complications associated with these infections. In this study, we intended to investigate the common pathogens and their antimicrobial susceptibility patterns from the pyogenic wound infections at a tertiary care hospital in Kathmandu, Nepal. A laboratory based cross-sectional study was carried out among the pyogenic clinical specimens of the patients visiting Manmohan Memorial Teaching Hospital, Kathmandu, Nepal...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/28804654/histoplasmosis-by-histoplasma-capsulatum-var-duboisii-observed-at-the-laboratory-of-pathological-anatomy-of-lom%C3%A3-in-togo
#16
Tchin Darré, Bayaki Saka, Abas Mouhari-Touré, Améyo Monique Dorkenoo, Koffi Amégbor, Vincent Palokinam Pitche, Gado Napo-Koura
Our study aimed to describe the epidemiological, clinical, and diagnostic aspects of African histoplasmosis in Togo through a descriptive and cross-sectional study on histological diagnosed African histoplasmosis in Pathology Department of Lomé from 2002 to 2016 (15 years). A total of 17 cases of African histoplasmosis were diagnosed. The sex ratio (M/F) was 1.8. The annual incidence was 1.1 cases. The mean age of the patients was 27.2 ± 0.4 years. All our patients were of social categories with a low socioeconomic level...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/28523192/comparative-response-of-the-nigerian-indigenous-and-broiler-chickens-to-a-field-caecal-isolate-of-eimeria-oocysts
#17
Lucas Atehmengo Ngongeh, Amaechi Onyeabor, Emeka Nzenwata, Gurama Kansalem Samson
Response of Nigerian indigenous (local) and broiler chickens to experimental Eimeria infections was investigated by measures of clinical signs, packed cell volume (PCV), body weights (BW), feed consumption, faecal oocyst counts (oocyst per gram), and microscopic intestinal lesions. Three-week-old chickens of each breed received single pulse infections with 2500, 5000, and 100.000 sporulated Eimeria oocysts. Infected birds were dull and passed bloody diarrhoea. OPG showed a dose related response but no significant difference between groups (P > 0...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/27999684/a-perspective-of-the-diagnosis-and-management-of-congenital-tuberculosis
#18
REVIEW
Manou Irmina Saramba, Dongchi Zhao
Tuberculosis continues to be a prevalent disease in the world and a global public health issue in many countries. The disease is more complicated in pregnant women because it imperils unborn offspring and results in congenital tuberculosis later if undiagnosed and untreated. Congenital tuberculosis is rare entity and an uncommon disease along with a high mortality rate. Congenital tuberculosis, a severe clinical type of tuberculosis caused by Mycobacterium tuberculosis , is a serious and fatal disease if left untreated...
2016: Journal of Pathogens
https://www.readbyqxmd.com/read/27656298/etiology-and-clinical-characteristics-of-single-and-multiple-respiratory-virus-infections-diagnosed-in-croatian-children-in-two-respiratory-seasons
#19
Sunčanica Ljubin-Sternak, Tatjana Marijan, Irena Ivković-Jureković, Jasna Čepin-Bogović, Alenka Gagro, Jasmina Vraneš
The aim of this study was to determine the causative agent of acute respiratory infection (ARI) in hospitalized children, as well as investigate the characteristics of ARIs with single and multiple virus detection in two respiratory seasons. In 2010 and 2015, nasopharyngeal and pharyngeal swabs from a total of 134 children, admitted to the hospital due to ARI, were tested using multiplex PCR. Viral etiology was established in 81.3% of the patients. Coinfection with two viruses was diagnosed in 27.6% of the patients, and concurrent detection of three or more viruses was diagnosed in 12...
2016: Journal of Pathogens
https://www.readbyqxmd.com/read/27630775/clinical-effects-of-gamma-radiation-resistant-aspergillus-sydowii-on-germ-free-mice-immunologically-prone-to-inflammatory-bowel-disease
#20
Alexander Rodriguez-Palacios, Natalia Aladyshkina, Mauricio Retuerto, Christopher L Hager, Sanja Ilic, Mahmoud A Ghannoum, Fabio Cominelli
We report and investigated a case of inadvertent contamination of 125 mice (housed in two germ-free positive-pressurized isolators) with emerging human and coral pathogen Aspergillus sydowii. The infected mice correspond to genetic line SAMP1/YitFc, which have 100% immune predisposition to develop Crohn's disease-like spontaneous pathologies, namely, inflammatory bowel disease (IBD). Pathogen update based on a scoping review of the literature and our clinical observations and experimentation are discussed. The unwanted infection of germ-free mice (immunologically prone to suffer chronic inflammation) with human pathogen A...
2016: Journal of Pathogens
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