The life cycle of the malaria parasite Plasmodium falciparum is a complex one involving the mosquito and the human. The definitive host for this infection is the mosquito and the intermediate host is the human. Asexual reproduction occurs during the infection of humans but sexual reproduction occurs in the mosquito. The infection is transmitted through the bite of the Anopheles mosquito, which is prevalent in tropical areas. Climate change means that mosquitoes are becoming more widespread, but developed countries are better equipped to control them.
The vast majority of fungal infections are opportunistic and opportunistic infections occur in patients who are immunocompromised, therefore fungal infections such as Pneumocystis pneumonia are commonly seen in patients with AIDS. Patients who are undergoing prolonged treatment with antibiotics risk the destruction of their normal flora, which could give fungi the chance to cause an infection.