Disease Vectors and Pathogens

 Francisella tularensis is the causative agent of tularemia. Primary reservoirs are rabbits, hares and ticks. Man most commonly acquires tularemia via insect bites (ticks primarily, but also deer flies, mites, blackflies, or mosquitoes) or by handling infected animal tissues.  

Legionella pneumophila facultative intracellular pathogens, which stain poorly as Gram negative rods. It resides in the environment in pools of stagnant water worldwide. It is found as an intra-cellular agent within protozoa and a component of biofilms.

Yellow fever is a viral disease primarily transmitted by the bite of infected Aedes aegypti mosquitoes. The other options are not standard medical terms for mosquito-borne illnesses.

This is the correct option.

Leucorrhea is caused due to a flagellated protozoan parasite Trichomonas vaginalis.

Rice water stool is a classic clinical manifestation of cholera, caused by the Vibrio cholerae bacterium, leading to severe dehydration.

Splenomegaly (enlargement of the spleen) is a common clinical finding in malaria due to the destruction of infected red blood cells and the immune response.

Wuchereria bancrofti is a parasitic roundworm that causes lymphatic filariasis, which can lead to the condition known as elephantiasis.

The sand fly is the primary vector for the protozoan parasite Leishmania, which causes Leishmaniasis. Malaria is spread by Anopheles mosquitoes, and Dengue/Chikungunya are spread by Aedes mosquitoes.

At least 10% of the population suffer to a greater or lesser degree from allergies involving localized IgE-mediated anaphylactic reactions to extrinsic allergens. An increasing number of these allergens have now been cloned including Der p1-14 from house dust mites and Lol p1-11 from rye grass pollen.

Ronald Ross discovered that the malaria parasite is transmitted by the Anopheles mosquito in 1897 and published his findings in 1898. This is a landmark date in medical history.

Bite of dog causes rabies as bite of mosquito causes malaria.

Malaria is a type of disease as spear is a type of weapon.

Phleobotmus or sand fly spreads kala azar.