Acanthocephala           

                No slides of Acanthocephala Phylum

Trichanella spiralis

1)                     Newborn larvae. Enter the muscle and encyst.

2)                    3 larvae in 3 separate cysts in muscle cells.

3)                    3 larvae in 1 single cyst in a muscle cell.

 Cysts can survive for years until it degenerates or calcify.

4)                     Old cyst undergoing degeneration in muscle.

5)                    Old cyst undergoing calcification in muscle.

6)                    Calcified cysts.

 Cysts become nurse cells once the enclosing muscle cell degenerates.

  7)                   Nurse cells with larvae in muscle.

 Infected meat is eaten.

 8)                     Muscle larvae. Isolated by pepsin digestion in the stomach. Passed to the intestine.

9)                      In feces.

 

Develop in the epithelium of the small intestine where females release newborns into the lymphatics.

 

10)             8 hrs after oral infection (AOI)

11)            20 hrs AOI

12)             27 hrs AOI

13)             34 hrs AOI

14)             Adult female – 2x the size of males

15)            Adult male – more slender at the anterior end.

 

 

Trichuris trichiura

16)         Egg in stool.

 

17)         Adult males.

 

18)         Adult females.

 

19)         Adult males + females.