Beri Beri among these diseases, is a disease that is not spread by mosquitoes. Beriberi refers to symptoms caused by thiamine (vitamin B1) deficiency. Beriberi has conventionally been divided into three separate entities, relating to the body system mainly involved (peripheral nervous system or cardiovascular) or age of person (like infantile).
Historically, beriberi has been common in regions where polished or white rice forms a major part of the diet, which has its husk removed to extend its shelf life and improve its palatability, but has the side effect of removing the primary source of thiamine. It was not known until the end of the 19th century that polishing rice was associated with beriberi.