Oesophagostomum radiatum

nodule worm of cattle 

*adult nematodes live in small intestine-eggs are laid in small intestine-eggs are passed in feces-eggs hatch and larvae develop to infective 3rd stage in soil and feces-host ingests infective larvae-larvae penetrate mucosa and submucosa of small and large intestines and coil up-larvae return to lumen and matrue to adult stage

Oesophagostomum radiatum

nodule worm of cattle-egg 

Moniezia benedeni egg

tapeworm of cattle 

Moniezia benedeni

tapeworm of cattle 

*mature cestodes in small intestine-gravid segments break off and pass in feces (as embryonated eggs and segements)-IH mite ingests infective eggs which hatch and develop into cysticercoids-host ingests infected mite-cysticercoids are freed during digestion and attach to intestinal wall to mature 

Eimeria sp. sporulated oocyst

host: cattle (ruminants, horses)

-coccidia of large animals 

*meronts form in epithelial cells-asexual mating for several generations- male/female versions form and fertilized zygotes rupture out of epithelial cells-these oocysts pass in feces-develop to infective stage in soil and feces-host ingests sporulated oocysts-invade cecal or intestinal epithelial wall-cycle continues 

Hypoderma sp.larva

cattle grub flies

*adult flies copulate(do not feed)-female attaches eggs to hairs(lower parts of the legs)-eggs hatch-larvae penetrate skin and migrate for 5 months to sq tissue on back and cut breathing holes in skin-larvae grow and as grubs drop to ground to pupate-pupae form in loose soil-adults emerge from pupae

*H.lineatum lays many more eggs then H. bovis

*H.lineatum migrates to area of esophagus and trachea/H. bovis migrates to spinal canal 

Fasciola hepatica

liver fluke of cattle and sheep

-trematode

*adults in biliary system-eggs laid in bile ducts-eggs pass in feces-miracidia develop in eggs-free swimming miracidia hatch from eggs in water- penetrate snail-sporocysts and then rediae develop in snail-cercariae develop in rediae-free swimming cercariae emerge from snail- become infective on vegetation in water and are ingested by host-freed during digestion become young flukes, migrate to bile ducts and mature to adult stage.

*zoonotic 

Fasciola Hepatica

egg- liver fluke of sheep and cattle