The disinfection process does not take place at once but is a gradual operation in which the number of organisms killed in unit time is greater at the beginning and becomes less and less as the exposure period is increased. If the numbers of survivors in unit volume are plotted against time, the points fall on smooth curves. If the [...]
Two general types of immunity are recognized – natural immunity and acquired immunity. The word "immune" is derived from the Latin stem immuno, meaning safe, or free from. In its most general sense, the term implies a condition under which an individual is protected from disease. This does not mean, however, that one is immune to all diseases, but rather [...]
In this article we will discuss about:- 1. General Features of Parasitic Infection 2. Factors Affecting the Shift from Parasitic Infection and Diseases 3. Examples. Features of Parasitic Infection: Some parasites (ectoparasites) live on the surface of the host and others (endoparasites) live inside the host. Some ectoparasites are important as disease agents in their own right (e.g. scabies mites) [...]