Mosquitoes are known to spread a variety of diseases, some of the most common include:
Malaria: a parasitic infection that affects the red blood cells and can cause fever, chills, and flu-like symptoms.
Dengue fever: a viral infection that causes fever, headache, muscle and joint pain, and a rash.
Chikungunya: a viral infection that causes fever and joint pain.
West Nile virus: a viral infection that can cause fever, headache, body aches, and sometimes more severe symptoms such as encephalitis or meningitis.
Yellow fever: a viral infection that can cause fever, headache, jaundice, and sometimes more severe symptoms such as kidney failure or bleeding.
Zika virus: a viral infection that can cause fever, rash, joint pain, and sometimes more severe symptoms such as microcephaly in infants born to infected mothers.
Japanese encephalitis: a viral infection that causes inflammation of the brain and can lead to seizures, coma, and death
Rift Valley fever: a viral infection that causes fever, headache, muscle and joint pain, and sometimes more severe symptoms such as encephalitis or meningitis.
It's worth noting that not all species of mosquitoes transmit diseases and the presence of mosquitoes doesn't always mean that a disease is present. Also, some of these diseases may not be present in all regions, and it may vary depending on the location.