Which type of fly is known to transmit cholera?

The correct choice is filth flies, which are recognized for their role in the transmission of various pathogens, including those that cause diseases like cholera. Filth flies, such as house flies, are commonly found in areas where there is decaying organic material, human waste, and other unsanitary conditions. They can pick up bacteria and viruses from these contaminated surfaces and subsequently transfer them to food and water sources through their bodies and saliva, creating a pathway for disease transmission.

Filth flies are particularly concerning in public health because they have a broad range of habitats, are highly mobile, and can proliferate quickly in unsanitary environments. Understanding their behavior and the environments they thrive in is crucial for implementing effective pest control measures and minimizing the risk of disease outbreak, particularly in areas where cholera is prevalent.

In contrast, flesh flies are more associated with decaying animal matter, sand flies are vectors for leishmaniasis, and mosquitoes are primarily known for transmitting diseases such as malaria and dengue fever. While each of these pests has public health significance, none are implicated in the direct transmission of cholera like filth flies are.