Option (b) is correct i.e. pediculosis, contagious disease creates a primary skin lesion that is a pinpointed macule, papule, or wheal with hemorrhagic puncture site.
Most infections of head lice i.e. pediculosis are symptomless. When symptoms are present, there may be irritation, a tickling sensation as though something is moving in the hair, and itching due to an allergic reaction to louse saliva. One potential source of problems is secondary bacterial infection. The pathogens that cause Bartonella quintana, Rickettsia prowazekii, and Borrelia recurrentis body lice are a vector for (louse-borne relapsing fever). The most common way that head lice are transmitted is through contact with an infected person (i.e., head-to-head contact). During play (sports, playgrounds, summer camp, and sleepovers), at home, school, and in the community, there is frequently contact. Less frequently, it is possible for flies to transmit head lice (more common with body lice). Transmission can also occur if you use infected combs, brushes, towels, or if you lie on a bed, couch, pillow, carpet, or stuffed animal that has recently come into contact with an infected person.
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Answer: Steam burns the skin worse than hot water because the heat of vaporization is released as well.
Explanation:
The steam exhibit more energy than water at the same temperature that is 100° C. The steam uses the latent heat of vaporization so as to get vapourize and water do not exhibit energy. This latent heat of energy causes severe burns due to steam as compared to water. Steam burns are caused by the heat of vapors and they form scalds.
<h2><u><em>AIDS epidemic Russia</em></u></h2>
The number of people living with HIV in Russia now exceeds 1 million, according to official statistics. Most experts say the true figure is likely to be at least 1.5 million — around 1 percent of the total population of 146 million — because many people are unaware of their HIV-positive status.
Answer:
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