| Common and/or scientific names of parasitism and parasite |
Usual location and gross length |
Intermediate hosts or direct cycle |
Mode of infection |
Treatment* |
|
Ascaris suum |
Small intestine, bile ducts, stomach 15-30 cm |
Direct | Orally from contaminated environment |
All |
|
Isospora suis |
Smll intestine | Direct | Orally from contaminated environment |
None |
|
Mycoplasma suis |
On erythrocytes 0.8-1.0 μm |
Intermediate hosts. Possible direct | Arthropod bites? Contaminated instruments? |
Tetracyclines Arsenicals |
|
Stephanurus dentatus |
Adults in perirenal fat, kidneys, ureters walls. Juveniles in ectopic sites. 20-45mm | Earthworms. Also direct |
Larvae in earthworms. Prenatally, orally; skin penetration by juveniles | FBZ, AVE, LVM |
|
Metastrongylus spp. |
Posterior border of diaphragmatic lobes of lungs. 20-50 mm | Earthworms. Also direct |
Ingest larvae or earthworms with encysted larvae. | DCV, FBZ, AVE |
|
Macracanthorhynchus hirudinaceus |
Small intestine, usually ileum Up to 30 cm |
Direct | Prenatally, transcolostrally, orally, cutaneously | None |
|
Strongyloides ransomi |
Small intestine of suckling pigs 3.3 -4.5 mm |
Direct | Prenatally, transcolostrally, orally, cutaneously | DCV, FBZ, AVE, LVM, TBZ |
|
Trichuris suis |
Cecum and large intestine 5-8 cm |
Direct | Ingestion of embryonated ova |
DCV, FBZ |
|
Gullet worm Gongylonema pulchrum |
Subepithelium of esophagus, tongue | Dung beetles | Ingestion of beetle with encysted larvae | FBZ, AVE, LVM |
|
Red stomach worm Hyostrongylus rubidus |
Stomach < 10 mm | Direct | Ingestion of larvae | DCV, FBZ, AVE, TBZ |
|
Thick stomach worms Ascarops strongylinaand Physocephalus sexalatus |
Stomach | Dung beetles | Ingestion of beetles with encysted larvae | FBZ, DCV |
|
Hookworm Globocephalus |
Small intestine of feral and pastured swine in southern US | Direct | Larvae bore into skin | DCV, FBZ, AVE, LVM |
|
Liver flukes Fasciola hepatica |
Liver of pigs on pastures used by sheep. 30 mm | Snails | Ingestion of encysted metacercariae on grass | None |
|
Trichinosis Trichinella spiralis |
Muscle of many mammals, especially swine and bears | Many mammals | Ingestion of muscle with encysted larvae (raw garbage, wild animal carcasses, rats, mice, cats) or cannibalism | Not practical |
|
Pork measles Taenia solium |
Cysticercus cellulosae in skeletal and cardiac muscles of swine. < 18 mm |
Swine | Ingestion of human feces containing gravid proglottids |
None |
Key:
AVE = avermectin
DCV = dichlorvos
FBZ = fenbendazole
LVM = levamisole
PIP = piperazine
PRT = pyrantel tartrate
TBZ = thiabendazole