What is the epidemiology of Entamoeba histolytica?
World Health Organization reported that Entamoeba histolytica affects approximately 500 million people worldwide, resulting in symptomatic diseases in 50 million and mortality in 100,000 persons (Lozano et al., 2012). About 80-90% of infections are asymptomatic and are likely due to the nonpathogenic species E.
What is the prevalence of Entamoeba histolytica in Nigeria?
Overall prevalence of Entamoeba histolytica was 11.2%. Prevalence increased rapidly in younger age groups and there were no real differences between males and females.
Which disease is spread by Entamoeba histolytica?
The symptoms are often quite mild and can include loose feces (poop), stomach pain, and stomach cramping. Amebic dysentery is a severe form of amebiasis associated with stomach pain, bloody stools (poop), and fever. Rarely, E. histolytica invades the liver and forms an abscess (a collection of pus).
What is the pathology of Entamoeba histolytica?
Entamoeba histolytica is an invasive enteric protozoan [1, 2, 10]. Infection typically begins with the ingestion of mature, quadrinucleated cysts found in fecally contaminated food or water. Excystation occurs in the small intestine with the release of motile trophozoites, which migrate to the large intestine.
What is the epidemiology of amoebiasis?
The overall prevalence of amebiasis in the United States is approximately 4%. E dispar infection, which is always asymptomatic, is 10 times more common than E histolytica infection. Moreover, only 10% of E histolytica infections cause invasive disease.
What is Magna and Minuta?
Trophozoites: The adult trophic form of Entamoeba is known as Trophozoite or Magna. It inhabits anterior part of large intestine, i.e. colon of human beings. These are distinctly smaller than the normal trophozoites and are called Minuta forms. Precystic (minuta Form):
What is the life cycle of amoebiasis?
Life Cycle Infection by Entamoeba histolytica occurs by ingestion of mature cysts (2) in fecally contaminated food, water, or hands. Excystation (3) occurs in the small intestine and trophozoites (4) are released, which migrate to the large intestine.
What is amoebiasis pathophysiology?
Amebiasis is a parasitic infection caused by the protozoal organism E histolytica, which can give rise both to intestinal disease (eg, colitis) and to various extraintestinal manifestations, including liver abscess (most common) and pleuropulmonary, cardiac, and cerebral dissemination.
What are the two types of epidemiology?
Epidemiologic studies fall into two categories: experimental and observational.
Who is the father of epidemiology?
John Snow
In the mid-1800s, an anesthesiologist named John Snow was conducting a series of investigations in London that warrant his being considered the “father of field epidemiology.” Twenty years before the development of the microscope, Snow conducted studies of cholera outbreaks both to discover the cause of disease and to …
What kind of disease does Entamoeba histolytica cause?
Summary Entamoeba histolytica is an invasive, pathogenic protozoan, causing amoebiasis, and an important cause of diarrhea in developing countries.
How is Entamoeba dispar different from other amoeba?
Our understanding of its epidemiology has dramatically changed since this amoeba was distinguished from another morphologically similar one, Entamoeba dispar, a non pathogenic and commensal parasite. These two species can now be distinguished mainly through molecular and immunological procedures.
How is the epidemiology of E.histolytica studied?
The epidemiology of E. histolytica has been studied around the world. world where the disease is actually more common. Epidemiological figures in many endemic tropical countries are often overesti mated because of inaccurate identification. development of resistant types and reducing management costs.
Which is more metabolic opportunist e.e.histolytica?
E. histolytica is more of a metabolic opportunist which is able to exploit oxygen when it is present in the environment.