As nouns the difference between larva and microfilaria
is that larva is an early stage of growth for some insects and amphibians, in which after hatching from their egg, insects are wingless and resemble a caterpillar or grub, and amphibians lack limbs and resemble fish while microfilaria is the very small larva of a filarial worm.
larva
Noun
An early stage of growth for some insects and amphibians, in which after hatching from their egg, insects are wingless and resemble a caterpillar or grub, and amphibians lack limbs and resemble fish.
An animal in the aforementioned stage.
A form of a recently born or hatched animal that is quite different from its adult stage.
Usage notes
Although the plural (larvas) is somewhat common, it is regarded by some as incorrect.
microfilaria
English
Noun
(microfilariae)
(biology) The very small larva of a filarial worm