I believe the mosquito is playing the role as a vector.
Someone who is hostile, selfish, and unreliable would score low in two dimensions from the Five Factor Model, which are: agreeableness (for hostility and selfishness), and conscientiousness (for unreliability).
<em>Agreeableness</em> refers to the degree to which someone is willing to acquiesce to another individual – thus making them generally more forgiving and helpful. Low scorers would be more prone to fighting with other people than high scorers, and tends to put themselves first. <em>Conscientiousness</em> refers to the degree to which someone is well-organized and disciplined – the lower the score, the messier and less organized the person.
