1. Ostertagia Brown stomach worm

2. SUPERFAMÍLIA: TRICHOSTRONGYLOIDEA FAMÍLIA:TRICHOSTRONGYLIDAE
FILO: NEMATHELMINTES
SUPERFAMÍLIA: TRICHOSTRONGYLOIDEA
FAMÍLIA:TRICHOSTRONGYLIDAE
apatia, emagrecimento
diarréia
falhas reprodutivas
hipoproteinemia, edemas
anemia: Haemonchus,
hematófago
Gêneros:Trychostrongylus, Haemonchus, Cooperia, Nematodirus, Ostertagia

5. Ostertagia egg
Eggs shed by Strongyle-trichostrongyle parasites are similar and are counted by not differentiated by fecal exam, except Bunostomum, which is larger and darker

6. Adult male Ostertagia and inhibited (hypobiotic) early L4 larvae from the abomasal gastric glands.
Hypobiosis allows escape from adverse conditions via climatically adapted genetic strains, although influenced by immunity, crowding effect. Resume develop ‘cue’ unknown.

8. Ostertagia cervical papillae are less robust than Haemonchus.

9. Ostertagia bursa and short spicules.

10. Ostertagia vulvar flap

11. Adult Ostertagia in the abomasum.

12. Crater-like nodules due to the emergence of Ostertagia L4.

13. Ostertagia – nódulos (abomasum)

14. Inhibited Ostertagia

16. Common winter condition of coastal marsh cattle
Common winter condition of coastal marsh cattle. This is the time of maximum adult parasite burdens and greatest effects on host.

18. Haemonchus Barber pole worm

20. Haemonchosis Barbers pole worm Found in abomasum Prolific Results
Blood sucker
Prolific
Results
Ill thrift
Anemia, bottle jaw
Sudden death

21. Haemonchus
Note the “barber pole” on live worms grossly visible in abomasum at mucosal surface.

22. Haemonchus cervical papillae (light and scanning microscopes).

23. Haemonchus stylet (light and scanning microscopes) assists in blood sucking.

24. Haemonchus bursa and spicules.

26. Haemonchus diagnosis

28. Haemonchus sp.

32. “Bottle Jaw” in merino-x and Targhee sheep due to Haemonchus, the major limiting parasite in Louisiana.