Question

................. is an viral infection transmitted by mosquito

• A. Typhus
• B. Yellow Fever
• C. Plague
• D. Filariasis

Answer 1

The correct option is B Yellow Fever

Yellow fever, known historically as yellow jack or yellow plague, is an acute viral disease. In most cases, symptoms include fever, chills, loss of appetite, nausea, muscle pains particularly in the back and headache. The disease is caused by the yellow fever virus and is spread by the bite of the female mosquito. Thus option B is correct.
Plague is a deadly infectious disease that is caused by the enterobacteria Yersinia pestis, named after the French-Swiss bacteriologist Alexandre Yersin. Depending on lung infection or sanitary conditions, plague can be spread in the air, by direct contact or by contaminated undercooked food or materials. Plague can not be spread through mosquito bite. thus, option C is wrong.
Filariasis (or philariasis) is a parasitic disease that is caused by thread-like roundworms belonging to the Filarioidea type. These are spread by blood-feeding black flies and mosquitoes. Thus, option D is wrong.
Typhus fevers are caused by the rickettsiae bacteria and transmitted by arthropod (e.g., flea, mite, tick) bites. When arthropods bite a victim, they leave the rickettsaie bacteria behind. Scratching the bite opens the skin to the bacteria, allowing them to enter the bloodstream. Within the blood stream, the bacteria grow and replicate. Thus, option A is wrong.