In this article we will discuss about the meaning and types of infection. Meaning of Infection: Infection can be defined as the process of lodgment and multiplication of a parasitic organism within or on a host. Infection is a common natural event and does not invariably result in disease. In fact, disease is a rare consequence of infection. Whenever, an [...]
In this article we will discuss about the normal microflora of different parts of human body. Normal Microflora of the Skin: An average adult human is covered with approximately 2 m2 of skin. It has been estimated that this surface area supports about 1012 bacteria. The skin (Fig. 44.1) surface (epidermis) is not a favourable place for abundant microbial growth, [...]
The following points highlight the six main factors that contribute for microbial pathogenicity. The factors are: 1. Adhesion 2. Invasiveness 3. Toxigenicity 4. Communicability 5. Infectivity Dose 6. Route of Infection. Microbial Pathogenicity: Factor # 1. Adhesion: The initial event of microbial pathogenicity is the adherence of the pathogen to the body surface of the victim. This attachment is not [...]