Different sources of infection, Biology

Different sources of infection:

There are many sources of infection such as reservoirs, carrier organisms and lifeless objects.

Reservoirs: A habitat where the disease causing organism lives prior to infection is known as the reservoir for infectious agent. There are three types of reservoirs - human reservoirs, animal reservoirs and reservoir of non-living substances. In the reservoir, the infectious agent lives and even mulitplies. The disease causing organism may or may not produce sickness in the reservoir organisms.

Carrier organisms: Carrier organisms are those in which the disease causing organisms are present in large numbers but does not produce sickness. As a result, carrier organisms live along with normal persons and may even spread disease from person to person. The carrier appears normal but is infected with a disease-causing organism. For example rats are carriers for plague, bacteria; monkeys are
carriers for yellow fever and human beings are carriers for viral diseases such as hepatitis.

Lifeless objects: Some of the lifeless objects such as towels, clothes, injection needles and excreta or sputum of the sick persons may also act as reservoirs for diesease causing organisms. These organisms cannot travel by themselves from the reservoir to a human being. They require some agent to transport them.

Posted Date: 8/29/2012 7:22:07 AM | Location : United States







Related Discussions:- Different sources of infection, Assignment Help, Ask Question on Different sources of infection, Get Answer, Expert's Help, Different sources of infection Discussions

Write discussion on Different sources of infection
Your posts are moderated
Related Questions
Explain risk factor at the global perspective in heart diease? While the risk of Cardio-vascular diseases has been found to be variable in different ethnic groups with the high

How many of each type of core histone would it take to wrap the entire human genome into nucleosomes? How has evolution solved the problem of producing such a large number of prote

A red blood cell has an internal salt concentration of 150mM. The cell is placed in a beaker of 500mM salt. (a) Assuming that the cell membrane is permeable to water but not to

what is surrogate motherhood

It is defined as the total amount of heat produced, when unit mass/volume of the fuel has been burnt completely and the products have been cooled to room temperature (~ 15 0 C).

State in detail about the thylakoid membrane The thylakoid membrane contains all the factors associated with the photosynthetic electron transport leading to the generation of

how to classify the plants ?

Two chromosomes in a cell have identical length and centromere position yet are not homologous, what is different about them

What is the objective of genesis of coronary artery diseases and risk factors ? After reading this unit, you should be able to: Understand the genesis of CAD; 1 learns about th

Explain about Posterior wall Posterior wall separates the antrum from the infra-temporal fossa and contains two important structures. Posterior superior alveolar nerve and