QUESTION 17 Which of the following is not one of the features of a pathogenic is

Question

QUESTION 17 Which of the following is not one of the features of a pathogenic island"? o a. GCIAT ratio of pathogenic islands are usually different than that of the host pathogenic islands are considered part the the pan genome O C pathogenic islands are often found liked to tRNA regions of the genome pathogenic islands are probably the result of horizontal gene transfer pathogenic islands may function in toxin production but are known not to code for secretion systems O e. QUESTION 18 Which of the following statements is False? O a. pathogenicity is influenced by the resistance or susceptibility of the host b when a host is infected by a microorganism, disease does not necessarily follow C the internal body organs, such as the liver, spleen and heart, are normally sterile d an exotoxin is more heat labile than an endotoxin e. because of its low pH (around pH 2) the stomach is sterile

Explanation / Answer

e) False

The microorganism contain mobile genetic elements may range from 10-200 kb that encode genes which contribute to the virulence of the respective pathogen. Typical examples are adherence factors, toxins, iron uptake systems, invasion factors, and secretion systems.

18. a) False

The outcome of a host-parasite relationship depends on the pathogenicity(virulence) of the parasite; that is, on the ability of the parasite to cause damage on the host, and on the resistance or susceptibility of the host to the parasitea.This relationship is dynamic and the virulence of the pathogen and the resistance of the host are constantly changing.

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