GENERAL KNOWLEDGE

Detailed explanation-1: -The major diseases transmitted by houseflies are typhoid, cholera, salmonellosis, Dysentery, enteric fever, tuberculosis, anthrax, ophthalmia, etc. Dengue fever is not transmitted by housefly as its vector is the female Aedes mosquito. Parasitic strains of dengue are found in stagnant water places.

Detailed explanation-2: -From the above-given options, dengue fever is spread by the mosquitoes that too especially Ades. So from all the given options, typhoid is spread by housefly and it is the correct answer.

Detailed explanation-3: -Walter Reed and his coworkers investigated the cause of the typhoid epidemics in the U.S. Army camps and concluded that, next to human contact, the housefly (Musca domestica) was the most active agent in the spread of the disease.