Snail related factors include their genes, defense system, and age at the time of exposure to miracidia
(Richards, Knight, & Lewis, 1992; Abou-El-Naga & Radwan, 2012; Abou-El-Naga, Eissa, Mossallam, & Abd El-Halim, 2010; Abou-El-Naga, Sadaka, Amer, Diab, & Khedr, 2015).
The eggs hatch to release free-swimming miracidia
, which infect snails, the first intermediate hosts.
Eggs released in deer pellets develop into miracidia
The influence of water temperature and pH on the survival of Fasciola hepatica miracidia
The cause of death was attributed to air sac trematodes, which were identified as Szidatitrema species based on morphology of adult trematodes and miracidia
isolated from a snail intermediate host.
The oblique muscle fiber got damaged may be due to penetration of miracidia
at the time of infection in the nature.
Effect of ammonium chloride on Bimphalaria alexandrina and its infection with Schistosome mansoni and Echinostoma liei miracidia
The effect of environmental factors on the development behaviour and survival of Paramphistomum microbothrium miracidia
natalensis was exposed to miracidia
from eggs of Fasciola gigantica that were obtained from the slaughterhouse in Cotonou.
In addition, the ovicidal action of PZQ caused inviability of eggs by retraction of miracidia
, mostly of mature eggs.
in turn infect freshwater snails, where they become sporocysts, which in turn produce many more sporocysts by cell division.
The life cycle is complete when the eggs hatch, releasing miracidia
that infect specific freshwater snails (Biomphalaria species).