In this section is presented the stochastic SIS epidemic model for a closed environment. The order of exposition is the following: firstly is presented the deterministic SI epidemic model, secondly is presented the stochastic SI epidemic model, thirdly is presented the deterministic SIS epidemic model and finally is presented the stochastic SIS epidemic model. All these epidemic models are form...

cholera is an acute intestinal infection caused by consuming food or water contaminated with the bacterium vibrio cholerae. two main epidemiological characteristic of disease is tendency for create of sudden outbreaks and the ability to causing a pandemic. the objective of this study is to describe the epidemiology of the disease. this survey is a descriptive cross-sectional study based on repo...

We consider a mathematical model of epidemic spread  in which the  population  is partitioned  into five compartments of susceptible S(t), Infected I(t), Removed R(t), Prevented U(t) and the Controlled W(t). We assume each of the compartments comprises of cohorts of individuals which are  identical with respect to the disease status. We derive five systems of equations to represent each of the ...

The purpose of this report is to present Canada’s experience so far with the emergence of porcine epidemic diarrhea (PED) using a pro-active risk management approach. This approach is reflected in the actions the Canadian Food Inspection Agency took in collaboration with other stakeholders starting from the period the disease was first confirmed in United States to the time after it was confirm...