Schistosomes

Masters
Essay
Science
Pages 12 (3012 words)
Download 0
Schistosomiasis, or bilharzia is a parasitic disease caused by trematodes of the genus schistosoma and is considered by the world health organization as the second most important disease only to malaria, infecting hundreds of millions globally. Schistosomes themselves are as intriguing as the disease itself, exhibiting attributes that are unique to the genus (Combes 1991)…

Introduction

This article essays the implication of this unique physiological characteristic and its consequences on schistosome life history particularly their faithfulness while choosing a mate.
Adult schistosoma lives in the mammalian blood but their life cycle requires a phase of asexual reproduction within a secondary host. The life history of the parasite begins when adult female deposit eggs in the veins surrounding intestine or bladder. The mammal then continues the life cycle by transmitting those eggs through urine or feces. Once in water, the eggs hatch into marcidia, which must find an appropriate snail host. Once inside the snail each marcidium produce several hundreds of carcariea which when released in water seeks the skin of suitable mammals to burrow into. There are many different species of schistosomes of which Schistosoma haematobium, S. mansoni, and S. japonicum clinically important parasites that infect humans. Schistosoma haematobium , commonly called urinary schistosomiasis, dwells in the vesical veins surrounding the urinary tract and therefore mammal host usually excretes its eggs in urine. It is found throughout most of Africa and in parts of Western Asia. Two species, S. mansoni and S. japonicum cause intestinal schistosomiasis. S. mansoni usually occupies the mesenteric veins around the large intestine,while S. ...
Download paper
Not exactly what you need?

Related papers

Laboratory Information Management Systems Article
Since publication, the Bell-LaPadula model has helped in the advancement of science and technology by providing a mathematical basis for the examination of laboratory security. Moreover, this model is a major component of having a disciplined approach to building secure and effective laboratory systems.…
Anthropology
Anthropology is made up of four subfields:…
Qualitative and Quantitative Research Methodologies
Unlike research studies in other fields, studies in health and social sciences involving the use of human subjects requires greater caution. The Helsinki Declaration of the World Medical Association declares that, though progress in health-related fields requires research and experimentation involving the use of human subjects, considerations related to the 'well being of the human subjects should…
The Routines of Decision Making
2. The maximum purchase price for the pair of bindings is $10.00, as this is the cost of production that differs between the alternatives. In case if the price is higher, the company will be realizing a loss.…
Charging and Discharging Capacitors
This is also true of the current through the circuit. Ultimately, at full charge, the voltage, ideally, becomes equal to that of the charging battery.…
Schistosomes
This article essays the implication of this unique physiological characteristic and its consequences on schistosome life history particularly their faithfulness while choosing a mate.…
Qualitative Research Procedures
i. Qualitative Research: This allows exploring even the traits like attitudes, perceptions or beliefs. Such research activity requires in-depth study of the subject. Albert Einstein once said1, "Not everything that counts can be counted, and not everything that can be counted counts". The qualitative research is meant to take care of such situations actually.…