Multi-factorialmeans that there are many different influences that act together tocause the appearance of a disease. The factors include effects of thecombination of genetic factors, which none of them is capable ofcausing the disease on its own. The concept of Multifactorialetiology believes that a particular combination of environmental andgenetic factors work together in triggering the development of amulti-factorial disease.
Variousenvironmental factors influence the development of differentmulti-factorial diseases. Also, environmental, workplace-relatedfactors and non-occupational lifestyle factors put the geneticallysusceptible persons at a risk of developing multi-factorial diseases.These factors form the various levels of prevention of themultifactorial diseases. These could be managing the environment,controlling lifestyles and work-related factors.
Ebolais caused by a virus that belongs to the family of Filoviridae,and genus Ebolavirus.Research has identified five species of Ebola virus. Out of the five,only four are known to cause infection of Ebola in humans. These areEbola virus, Sudan virus, Taï Forest virus and Bundibugyo virus. TheReston virus causes disease in non-human primates, but not in humans.
EbolaInfection occurs when there is direct contact with infect patientsthrough broken skin, mucous membranes with blood, and other bodilyfluids or secretions of infected people. Infection also occurs if ahealthy person comes into contact with an environment that becomescontaminated with fluids from an Ebola patient. Other transmissionsoccurred in communities while conducting funerals and other rituals
Thenatural history of Ebola disease remains unknown, and hence amystery. It has not been known how the virus survives in nature orwhere it lays dormant between epidemics.Symptomsof Ebola include High Fever, headache, Severe Muscle pain, BodyWeakness, Fatigue, Excess Diarrhea and Vomiting, Abdominal pain, andExcessive bleeding. These symptoms appear anywhere from 2ndto the 21stday of exposure to Ebola. The average is eight to ten days.
Therecent occurrence was the Ebola outbreak in West Africa, which wasfirst reported in March 2014. It was the deadliest occurrence ofEbola since it was discovered in 1976. The latest occurrence killedfive times more than the previous Ebola outbreaks combined.