Host resistance and immunity Essay Example | Topics and Well Written Essays - 500 words

Host resistance and immunity - Essay vitrineA negative colonization of the pathogen in the host body results in an infection. Variables that determine the outcome of a host body encounter with a pathogen include the infectivity, pathogenicity, virulence, toxigenicity, resistance, and antigenicity of the pathogens (Qureshi, S. 1999).Pathogenicity of an infection involves a mechanism that leads to the initiation of signs and symptoms of the bacterial or viral infections. An environment that favours the growth of the agent in the host body and its ability to alter the host determines the resultant outcome of the association between disease make agent and the host body. amply pathogenicity levels increases the risk of acquiring an infection. Therefore, once an individual gets exposed to a disease, the pathogenicity of the disease causing agent determines the mishap of the infection. On the other hand, if the bacteria or parasite turns out to be non-pathogenic, the risks of getting i nfection be low (Qureshi, S. 1999).Virulence refers to the severity of an infection and therefore a highly virulent strain produces heartbreaking infections. High virulent strains utilize resources from the host body and leads to tissue damage in host bodies. This increases the happening of an infection and may lead to death of the host. Virulent strains speed up their growth in distinguish to obtain transmission to new hosts. These strains struggle to gain subsequent transmission before killing the antecedent host. Therefore, once an individual gets exposed to a disease, the virulence of the disease determines the level of damage. To counter an infection, one contend to consider immediate treatment before multiplication of a strain that may be detrimental to one or more individuals (Sansonetti, P 2010).Toxigenicity refers to the ability of the agent to produce a toxin, which forms the main disease-causing section in a virus or bacteria. There are two types of toxins produced by disease causing parasites. They