Sarcocystis miescheriana infection in domestic pigs (Sus scrofa) in the Philippines.
Sarcocystis miescheriana sarcocysts were identified in skeletal muscles of 9 (27%) of 33 swine slaughtered for human consumption. Sarcocysts were 144-180 microm x 20-38 microm in size. Ultrastructurally, the cyst wall resembled the type 10 sarcocyst wall. The villar protrusions (VP) were 3-4.5 microm long and 0.6-1.2 microm wide and had prominent longitudinally arranged microtubules extending from the VP tips to the granular layer (=ground substance). The parasitophorous vacuolar membrane with its underlying electron-dense layer (EDL) measured 25 nm in thickness. The base of the VP exhibited minute (0.42-0.87 microm) bulblike inpocketings. Each VP had 80-90 microtubules situated underneath the EDL. The granular layer was 0.5-1.2 microm thick, and contained hairlike microtubules continuous with those of the VP core. This is the first report of S. miescheriana in Philippine domestic pigs Sus scrofa.
Claveria
F G
FG
Biology Department, College of Science, De La Salle University-Manila, Philippines.
De La Peña
C
C
Cruz-Flores
M J
MJ
D000003:Abattoirs; D000818:Animals; D003964:Diaphragm / Q000469:parasitology; D008460:Meat / Q000469:parasitology*; D018482:Muscle, Skeletal / Q000469:parasitology; D010679:Philippines / Q000453:epidemiology; D012523:Sarcocystosis / Q000453:epidemiology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000469:parasitology*