Abstract:
:Heterosporosis is an increasingly important microsporidian disease distributed worldwide, impacting wild and farmed-raised fish in both fresh and marine water environments. Twenty three out of 130 (17.69%) of the lizardfish Saurida lessepsianus were found to be naturally infected with microsporidian parasites. The rate of parasitic infection was increased during winter reaching 29.23% (19/65) and fall to 6.15% (4/65) in summer. The infection was recorded as numerous macroscopic whitish cysts reached 3.8-6.5 mm in diameter embedded in the abdominal cavity, skeletal muscles and mesenteric tissues of the infected fish inducing an enormous hypertrophy of infected tissues. Light microscopic examination revealed that parasitic foci were encapsulated by a host-derived fibrous membrane containing different developmental stages of the parasite. Spores were oval to pyriform in shape. Transmission electron microscopic study showed the presence of smooth membranes of the sarcoplasmic reticulum forming a thick, amorphous coat surrounding the various developmental stages of the examined parasite (meronts, sporont, sporoblasts, and spores). Mature spores were electron dense and uninucleate. The anchoring disk was found in a central position at the anterior end of the spore and a large vacuole was located at the posterior end. There was a definite number (7-8) of the polar filament turns. Molecular analysis based on the 16 small subunit (SSU) rDNA gene was performed to determine the phylogenetic position of the present parasite species. A 615 bp region of the 16SSU rDNA gene of the studied parasite was sequenced and deposited in GenBank under the accession number MF769371. Multiple sequence alignment demonstrated a high degree of similarity (>82%) with other twenty microsporidian species isolated from different aquatic hosts. The most closely related sequence was provided by the GenBank entry JF745533 for Heterosporis saurida isolated from the marine fish Saurida undosquamis with the highest percentage of identity (98%) and lowest divergence value (0.9). The ultrastructural characteristics and phylogenetic analysis support the recognition of a new species, herein named Heterosporis lessepsianus sp. n.
journal_name
Microb Pathogjournal_title
Microbial pathogenesisauthors
Al Quraishy S,Abdel-Gaber R,El Deeb N,Maher S,Al-Shaebi E,Abdel-Ghaffar Fdoi
10.1016/j.micpath.2019.02.025subject
Has Abstractpub_date
2019-05-01 00:00:00pages
10-18eissn
0882-4010issn
1096-1208pii
S0882-4010(18)32113-2journal_volume
130pub_type
杂志文章abstract::Bacillus anthracis secretes three major components, which assemble into two bipartite toxins: lethal toxin (LT), composed of lethal factor (LF) and protective antigen (PA) and edema toxin (ET), composed of edema factor (EF) and PA. EF is a potent calmodulin-dependent adenylate cyclase, which is internalized into the t...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2011.10.002
更新日期:2012-01-01 00:00:00
abstract::Pneumocystis infection leads to a life threatening pneumonia in susceptible individuals. While depletion or dysfunction of CD4+T cells is a key determinant of susceptibility to Pneumocystis, the host response that leads to resolution of infection or lung injury is less well understood. We had previously shown that mic...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2005.10.001
更新日期:2006-01-01 00:00:00
abstract::In this study we compared the host response to Listeria monocytogenes in 129 REJ mice with listeria-resistant (C57Bl/6j) and susceptible (Balb/c) mouse strains. In all experiments mice were inoculated by the i.p. route. 129 REJ mice and Balb/c mice were sensitive to listeriosis whilst C57Bl/6j mice were relatively res...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1995.0032
更新日期:1995-05-01 00:00:00
abstract::Uropathogenic Escherichia coli (UPEC) comprise a heterogeneous group of strains. In a previous epidemiological survey performed on 230 UPEC isolates, five virulence profiles were described, each one defined by the presence of some virulence determinants and by the absence of others. Phylogenetic groups and antibiotic ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2014.11.002
更新日期:2014-12-01 00:00:00
abstract:BACKGROUND:Probiotics have been associated with many beneficial effects in human digestive physiology. The aim of this study was to evaluate the effect of improved formulation of chitosan-alginate microcapsules of Bifidobacterium strains on serum triglycerides, cholesterol, HDL, and LDL in mice. METHODS:Five approved ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2020.104585
更新日期:2020-12-01 00:00:00
abstract:INTRODUCTION:Pneumococcal infections have caused morbidity and mortality globally. Streptococcus pneumoniae (pneumococci) are commensal bacteria that colonize the nasopharynx, asymptomatically. From there, pneumococci can spread in the lungs causing pneumonia and disseminate in the bloodstream causing bacteremia (sepsi...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2017.07.021
更新日期:2017-09-01 00:00:00
abstract::Our earlier studies showed that AhyRI- (AI-1) and LuxS-based (AI-2) quorum sensing (QS) systems were positive and negative regulators of virulence, respectively, in a diarrheal isolate SSU of Aeromonas hydrophila. Recently, we demonstrated that deletion of the QseBC two-component signal transduction system (AI-3 QS in...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2012.05.008
更新日期:2012-09-01 00:00:00
abstract::Pathogenic yersiniae undergo an established low calcium response (LCR) at 37 degrees C in Ca2+-deficient media characterized by restricted growth with synthesis of Lcr plasmid-encoded virulence functions. The latter include outer membrane peptides (Yops) known to undergo Pst plasmid-mediated post-translational degrada...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/0882-4010(89)90070-3
更新日期:1989-03-01 00:00:00
abstract::Diagnosis of toxoplasmosis is an important issue, especially in at-risk patients. The molecular methods showed a promising future for such diagnosis; however, the method itself and the target sequence to be detected is an important part of accurate detection of the infection. The aim of the present study was to evalua...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.103938
更新日期:2020-03-01 00:00:00
abstract::Fimbrial adhesins and hemolysins contribute to pathogenicity of extraintestinal Escherichia coli isolates causing urinary tract infections (UTI), sepsis and new born meningitis (NBM). Using gene cloning techniques and pulse field electrophoresis in combination with Southern hybridizations it was demonstrated that the ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/0882-4010(90)90048-u
更新日期:1990-03-01 00:00:00
abstract:BACKGROUND:Bacterial adhesins play an important role in the bacterial attachment and colonization. The aim of this study was comparison of adhesin genes expression in the planktonic and biofilm mode of growth among ESBL-non-producers isolates of K. oxytoca and effect of imipenem. MATERIALS AND METHODS:A total of eight...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.103558
更新日期:2019-09-01 00:00:00
abstract::Nonencapsulated Haemophilus influenzae frequently persists in the lungs of chronic obstructive pulmonary disease (COPD) and cystic fibrosis (CF) patients for prolonged periods of time. The bacteria are not eradicated by antibiotic treatment of the patients or by specific antibodies that are found in the sputum and ser...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1998.0269
更新日期:1999-05-01 00:00:00
abstract::Quorum sensing (QS), a cell-to-cell communication mechanism present in many bacterial species plays a key role in regulating the virulence factor and biofilm formation in many pathogens, which causes severe public health risk. Therefore, interfering with QS mechanism offers an attractive strategy to combat bacterial i...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2017.01.015
更新日期:2017-03-01 00:00:00
abstract::The clinical course of infection with Mycobacterium leprae varies widely and depends on the pattern of the host immune response. Dendritic cells play an important role in the activation of the innate and adaptive immune system and seem to be essential for the development of the disease. To analyze the presence of epid...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2015.11.013
更新日期:2016-02-01 00:00:00
abstract::The ability of three C. pneumoniae isolates, Kajaani 6, Helsinki 12 and TW-183, to grow in human umbilical vein endothelial cells (HUVEC) and in an immortalized endothelial cell line EA.hy 926 was studied. All C. pneumoniae isolates were capable of multiplying in endothelial cells. EA.hy926 cells could support the gro...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1994.1032
更新日期:1994-04-01 00:00:00
abstract::Salmonella is an important cause of food-borne infection worldwide. Detection of outbreaks caused by Salmonella spp. relies on suitable and robust methods for genotyping. Little is known about the genetic diversity of the Salmonella enterica subspecies enterica serotype Infantis strains isolated from human sources in ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2016.10.012
更新日期:2016-11-01 00:00:00
abstract::Enteropathogenic Escherichia coli (EPEC) uses a type III secretion system (T3SS) to inject effectors into host cells and alter cellular physiology. The aim of the present study was to identify targets of human secretory immunoglobulin A (sIgA) antibodies from the proteins delivered by EPEC into HEp-2 cells after infec...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2013.09.001
更新日期:2013-11-01 00:00:00
abstract::In Egypt, although the Trypanosoma evansi has been reported frequently among domestic animals, there is no published data on T. evansi in horses. Therefore, this study aimed to assess the prevalence and characterization of T. evansi in three governorates by examining blood samples from 40 local camels, 35 imported cam...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2018.07.017
更新日期:2018-10-01 00:00:00
abstract::Enterococci are opportunistic pathogens known to cause numerous clinical infections and complications in humans. Adhesin-mediated binding to extracellular matrix (ECM) proteins of the host is thought to be a crucial step in the pathogenesis of these bacterial infections. Adhesin of collagen from Enterococcus faecalis ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2007.03.003
更新日期:2007-08-01 00:00:00
abstract:AIMS:The main objective of the present study was to assess and compare the safety and inhibitory efficacy of Lactobacillus acidophilus against cholera toxin and shigatoxin production by measuring CTX-B and Stx1 expression level in Caco-2 cells exposed to Vibrio cholerae (as a non-invasive small intestine pathogens and ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2020.104543
更新日期:2020-12-01 00:00:00
abstract::Upon oxygen shift-down, Mycobacterium tuberculosis complex bacteria can induce a genetic program characterized by halted duplication, which is called Non-replicating persistence (NRP). During this phase, at least 48 genes, collectively named Dormancy survival regulator (DosR) regulon, are important for the long-term s...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2013.04.012
更新日期:2013-08-01 00:00:00
abstract::Salmonella spp. have been investigated as live vaccine vectors because they are heat stable and can elicit humoral, cellular, and secretory immune responses. However, the expression of some foreign antigens is toxic to bacterial vectors. We therefore studied an approach for the controlled expression of antigen in Salm...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1993.1060
更新日期:1993-08-01 00:00:00
abstract::In recent year, propagation and resistance of pathogenic microorganisms (bacteria, fungi and virals) to common antimicrobial agents has led to serious health and food problems. Today, nanotechnology science and nanoparticles (NPs) have been identified as a new approach to deal with this problem because of their inhere...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,评审
doi:10.1016/j.micpath.2018.08.008
更新日期:2018-10-01 00:00:00
abstract::Recent studies have been considered to symbiotic interactions of the human gastrointestinal microbiota and human lifestyle-related disorders. The human gastrointestinal microbiota continuously stimulates the immune system against opportunistic and pathogen bacteria from infancy. Changes in gastrointestinal microbiota ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,评审
doi:10.1016/j.micpath.2018.11.031
更新日期:2019-02-01 00:00:00
abstract::The mechanism of Cronobacter pathogenesis in neonatal meningitis and potential virulence factors (aside from host cell invasion ability) remain largely unknown. To ascertain whether Cronobacter can invade and transcytose across intestinal epithelial cells, enter into the blood stream and then transcytose across the bl...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2011.10.003
更新日期:2012-02-01 00:00:00
abstract::The differences between the immune response elicited during a self-limiting and a life-threatening lung infection with Streptococcus pneumoniae was analyzed in a mouse model of intranasal challenge using two different pneumococcal strains. M10, a serotype 11A strain, induced an early response within the first 12h afte...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2009.05.005
更新日期:2009-09-01 00:00:00
abstract::A trans-acting, positive effector of invasion plasmid antigen (Ipa) synthesis has been identified and mapped on the pWR100 invasion plasmid of Shigella flexneri serotype 5 (strain M90T-W). Recombinant plasmids carrying this regulatory gene, designated ipaR, were found to restore full virulence to a non-invasive ipaR::...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/0882-4010(90)90047-t
更新日期:1990-03-01 00:00:00
abstract::Acanthamoeba are free-living, harmless organisms, however, given the opportunity and the appropriate conditions, they can cause painful, sight-threatening as well as fatal infections and, thus, are considered opportunistic pathogens. Acanthamoeba infections have become increasingly important in the past few years due ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章,评审
doi:10.1016/s0882-4010(03)00061-5
更新日期:2003-06-01 00:00:00
abstract::Staphylococcus aureus (S.aureus), a Gram-positive organism, is a frequent cause of subclinical mastitis. Geniposide, an iridoid glucoside isolated from the fruits of Gardenia jasminoides, has been reported to exhibit antibacterial and anti-inflammatory properties. The ability of S. aureus internalizing into bovine mam...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2018.10.002
更新日期:2018-12-01 00:00:00
abstract::Chlamydia pneumoniae has been linked to atherosclerotic heart disease. However, there is a limited knowledge by which C. pneumoniae gain access to atheromatous lesions. The adhesion of C. pneumoniae -infected circulatory component(s) to endothelium and smooth muscle cells represents the first step in an inflammatory r...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.2000.0420
更新日期:2001-03-01 00:00:00