Which one of the following diseases is not transmitted by mosquitoes?Brain feverMalariaTyphoidDengue

To determine which disease among the listed options is not transmitted by mosquitoes, let's analyze each one:

1. Brain Fever: This term typically refers to encephalitis, which can be caused by viruses that are also transmitted by mosquitoes, such as West Nile virus and Japanese encephalitis.

2. Malaria: This is a well-known disease that is transmitted by the bite of infected female Anopheles mosquitoes.

3. Typhoid: This is caused by the bacterium Salmonella typhi and is not transmitted by mosquitoes. It is primarily spread through contaminated food and water.

4. Dengue: This viral disease is transmitted by Aedes mosquitoes, particularly Aedes aegypti.

Conclusion

The disease that is not transmitted by mosquitoes among the options provided is Typhoid. Thus, the correct answer is Typhoid.