Glossary terms with F Breadcrumb Home Glossary Glossary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z F Filarial worms Filarial worms are nematodes, which are parasites and can cause disease in humans. Flaviviruses Flaviviruses are transmitted to mammals and humans by the bite of infected mosquitoes and ticks. They cause serious diseases. n. FMT Fecal microbiota transplantation (FMT) refers to the process of transferring processed gut bacteria from the stool of a healthy donor into a patient.