LAB 4.docx - NAME Varsha Sooklal ID 66280 LAB 4 TITLE SIMULATING AN EPIDEMIC OF AN INFECTIOUS DISEASE INTRODUCTION Epidemiologists study the causes and

LAB 4.docx - NAME Varsha Sooklal ID 66280 LAB 4 TITLE...

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NAME: Varsha Sooklal ID: 66280 LAB# 4 TITLE: SIMULATING AN EPIDEMIC OF AN INFECTIOUS DISEASE INTRODUCTION: Epidemiologists study the causes and the spread of diseases through populations. By doing this, they can help to control and prevent diseases. Not only are there different infectious agents, but there are also different environments in which they live, methods by which they spread, methods of invasion into the host, and different hosts’ abilities to fight the infectious agent. Epidemiologist helps to prevent the spread of future infectious diseases and attempt to limit the emergency of mutations of the disease. Although epidemiologists study all diseases (not just caused by microbes), this simulation is a simple model of a microbial epidemic. Epidemiology is the study of the distribution and determinants of health-related states or events in specified populations, and the application of this study to the control of health problems. The reservoir of an infectious agent is the habitat in which the agent normally lives, grows, and multiplies. Reservoirs include humans, animals, and the environment. The reservoir may or may not be the source from which an agent is transferred to a host. Many common infectious diseases have human reservoirs. Diseases that are transmitted from person to person without intermediaries include the sexually transmitted diseases, measles, mumps, streptococcal infection, and many respiratory pathogens. Human reservoirs may or may not show the effects of illness. A carrier is a person with unapparent infection who is capable of
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transmitting the pathogen to others. Asymptomatic or passive or healthy carriers are those who never experience symptoms despite being infected. Incubatory carriers are those who can transmit the agent during the incubation period before clinical illness begins. Convalescent carriers are those who have recovered from their illness but remain capable of transmitting to others. Chronic carriers are those who continue to harbor a pathogen such as hepatitis B virus or Salmonella Typhi, the causative agent of typhoid fever, for months or even years after their initial infection. Carriers commonly transmit disease because they do not realize they are infected, and consequently take no special precautions to prevent transmission. Symptomatic persons who are aware of their illness, on the other hand, may be less likely to transmit infection because they are either too sick to be out and about, take precautions to reduce transmission, or receive treatment that limits the disease.
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