What is a well-known example of a fungal infection?

Thrush is indeed a well-known example of a fungal infection. It is caused by an overgrowth of the Candida species, particularly Candida albicans, which is a type of yeast that normally resides in small amounts in the human body but can lead to infection when its growth is not properly regulated. This condition typically manifests in the mouth or throat, presenting as white patches and can cause discomfort.

In contrast, the other options represent very different categories of infections. Chlamydia is a bacterial infection primarily transmitted through sexual contact. Measles is a viral infection characterized by a distinct rash and fever, and it spreads through respiratory droplets. Malaria, on the other hand, stems from a parasitic infection spread by the bites of infected mosquitoes and is caused by protozoa, particularly from the Plasmodium genus. Therefore, thrush stands out as a recognizably fungal infection among these choices.