Microscopic Examination of Emerging Cercariae and Observation of the Presence of Encysted
Larvae that migrate through the dog's body sometimes become encysted
in muscles, fat, or other tissues and this can cause pain and discomfort.
This study tested heart muscle tissue, where the parasite prefers to encyst
, and does not require a sample of fresh blood.
The oncospheres are filtered from the circulation and encyst
in muscular tissue.
It burrows the intestinal wall and encysts
in muscular tissues.
Protozoa typically encyst
. Bacteria and fungi can also produce spores that can persist for long periods.
Within the gills, Ascocotyle cercariae enter the blood stream by penetration of the vascular tissue and encyst
to form metacercariae in the fish host.
In adult dogs, L2 do not always complete the cycle described above but encyst
in various tissues of their host for a long period of time.
They bore through the intestinal wall into a blood vessel and are carded to muscle tissue where they encyst
, or form a protective capsule.
When the young dogs or cats shed the eggs of the roundworm in their feces, the eggs can encyst
in the soil for years.
1994), cyanobacteria to produce akinetes (Whitton 1987), algae to produce spores, cysts, or gametes that fuse into diapausing zygotes (Fryxell 1983, Blanco 1995, Burkholder and Glasgow 1995), and amoebae and ciliates to encyst
(Johnson and Evans 1939, Hashimoto 1962, Neff and Neff 1969, Grimes 1973, Corliss and Esser 1974, Walker et al.
In the amphipod Gammarus insensibilis, infective larvae (i.e., cercariae) of Microphallus papillorobustus (Trematoda, Microphallidae) systematically migrate into the amphipod's brain, encyst
in the cerebroid ganglia (Rebecq 1964) and consequently strongly alter their host behavior by inducing a positive phototactism, a negative geotactism and an aberrant-suicidal evasive behavior (Helluy 1983a,b).