Immunobiology of Human Infection by Entamoeba histolytica

1989 ◽  
Vol 8 (3-4) ◽  
pp. 179-205 ◽  
Author(s):  
Jonathan I. Ravdin
Keyword(s):  
Entamoeba Histolytica ◽  
Human Infection

scholarly journals A meta-analysis ofEntamoeba histolytica/disparin Iraq

2018 ◽  
Author(s):  
Khder Niazi Chalabi
Keyword(s):  
Confidence Interval ◽  
Entamoeba Histolytica ◽  
Meta Analysis ◽  
Random Effect ◽  
Random Effect Model ◽  
Human Infection ◽  
Infection Prevalence ◽  
Major Health Problem ◽  
Pooled Prevalence ◽  
Vegetables And Fruits

AbstractBackgroundAmebiasis is a major health problem caused by the protozoan parasiteEntamoeba histolyticawith a worldwide distribution, especially in developing countries. The aim of this systematic review and meta-analysis was to estimate the proportion prevalence ofE. histolytica/disparin human in Iraq.Methodology/Principal FindingsPublished studies on human infection withE. histolytica/disparin Iraq were searched in electronic databases using Google scholar, Iraqi Academic Scientific Journals (IASJ), PubMed, ScienceDirect and WHO Global Health Library (GHL). Eligible studies were cross-sectional and used fecal and/or serological methods to diagnoseE. histolytica/disparinfection in human in Iraq, and published between 1970 and July 2017. The pooled prevalence was calculated using random effect model meta-analyses with 95% confidence interval (CI). Ninety nine studies were eligible for the meta-analysis that included 117694 individuals. The pooled proportion for E. histolytica/dispar infection in Iraq was estimated at 20.61% with a 95% confidence interval (CI) of 17.83, 23.53. A high level of heterogeneity was found among the studies. The prevalence among Iraqi population ranged between 1.66 and 90.5% per study (mean: 22.36%). The pooled prevalence of infection was 58.43% (95% CI: 54.71%?62.1%) and 43.10% (95% CI: 39.66%–46.6%) for males and females respectively. Parasite screening using microscopy did not differentiate between the pathogenic and nonpathogenic species ofEntamoebaresulted in higher proportion prevalence than PCR proportion prevalence, (20.32%, 95% CI: 17.80%–22.96%) (17.57%, 95% CI: 8.07%–29.75%) respectively. Hospital based studies recorded the highest prevalence ofE. histolytica/disparinfection at 22.69% (95% CI: 19.55%–25.99%). The prevalence decreased into 18.46 (95% CI: 14.28%–23.04%) between 2010 and 2017.Conclusions/SignificanceAlthough there was a reduction in prevalence of amebiasis since 2010, the prevalence of amebiasis is still considerable in population of Iraq. Therefore, prevention strategies of fecal contamination are required to reduce the infection.Author summaryAmebiasis is the infection withEntamoeba histolyticaan invasive parasite dwelling the intestine or other organs such as liver, lungs, or skin of human. Infection with this parasite could be acquired by consumption of contaminated water, vegetables, and fruits with feces of infected human. The infection may be asymptomatic or symptomatic causing dysentery. We performed this meta-analysis to estimate the prevalence of amebiasis in the population of Iraq between 1970 and 2017. Ninety nine published studies were identified and the data were extracted from them to use in our meta-analysis and the total included individuals were 117694. The prevalence of population infection in Iraq was evaluated at 20.61%. The infection prevalence was higher in males than in females. The infection prevalence decreased during the period 2010 to 2017 in Iraqi population. This level of infection needs further efforts to eradicate amebiasis, these efforts begin with the prevention of the disease transmission through water and food and treatment of infected people. So awareness of simple hygienic principles can control the disease by boiling water and washing vegetables and fruits thoroughly.

Erythrophagocytosis by Entamoeba histolytica.- Ultrastructural Study

1972 ◽  
Vol 30 ◽  
pp. 156-157 ◽  
Author(s):  
Norberto Treviño ◽  
Alfredo Feria-Velasco ◽  
I. Ruiz de Chávez
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Entamoeba Histolytica ◽  
Ultrastructural Study ◽  
Saline Solution ◽  
Physiological Saline ◽  
Ultrastructural Level ◽  
Hot Plate ◽  
Physiological Saline Solution ◽  
Axenic Conditions

Although erythrophagocytosis by various species of Entamoeba is a well known phenomenon this has not yet been studied in detail at the ultrastructural level. The present work deals with the description of the incorporation process of erythrocytes by trophozoites of E. histolytica. For this study, trophozoites of E. histolytica, HK-9:NIH strain cultured in axenic conditions and washed human erythrocytes were placed on a hot plate at 37°C in physiological saline solution. After 5 minutes, 2.5% glutarldehyde was added and the samples were processed according to conventional techniques for electron microscopy.Based upon light microscopy studies on living trophozoites in contact with erythrocytes, it seems that erythrophagocytosis only takes place in one pole of the parasite.

Scanning electron microscopy of erythrophagocytosis by Entamoeba histolytica trophozoites

1992 ◽  
Vol 50 (1) ◽  
pp. 880-881
Author(s):  
Victor Tsutsumi ◽  
Adolfo Martinez-Palomo ◽  
Kyuichi Tanikawa
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Red Blood Cells ◽  
Entamoeba Histolytica ◽  
Causative Agent ◽  
Blood Cells ◽  
Protozoan Parasite ◽  
Complex Phenomenon ◽  
Great Capacity ◽  
Scanning Electron

The protozoan parasite Entamoeba histolytica is the causative agent of amebiasis in man. The trophozoite or motile form is a highly dynamic and pleomorphic cell with a great capacity to destroy tissues. Moreover, the parasite has the singular ability to phagocytize a variety of different live or death cells. Phagocytosis of red blood cells by E. histolytica trophozoites is a complex phenomenon related with amebic pathogenicity and nutrition.

Human infection with Dirofilaria

1978 ◽  
Vol 114 (4) ◽  
pp. 593-594 ◽  
Author(s):  
H. M. Payan
Keyword(s):  
Human Infection

A case of natural human infection by Echinostoma cinetorchis

1988 ◽  
Vol 26 (1) ◽  
pp. 61 ◽  
Author(s):  
Sang Kum Lee ◽  
Nak Seung Chung ◽  
Ill Hyang Ko ◽  
Haeng Ill Ko ◽  
Woon Mok Sohn
Keyword(s):  
Human Infection

Second case of human infection with Mesocestoides lineatus in Korea

1992 ◽  
Vol 30 (2) ◽  
pp. 147 ◽  
Author(s):  
K S Eom ◽  
S H Kim ◽  
H J Rim
Keyword(s):  
Human Infection

Human Infection with Fungi, Actinomycetes and Algae

1971 ◽  
Author(s):  
Roger Denio Baker ◽  
Alberto Angulo O. ◽  
Cesar Barroso-Tobila ◽  
Luis M. Carbonell ◽  
Rodolfo Céspedes F. ◽  
...  
Keyword(s):  
Human Infection
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