background: multiple sclerosis (ms) is the most common demyelinating and inflammatory disease of the central nevus system especially in young adults, but in a subgroup of patients the first clinical symptoms present after the age of 50. this clinical presentation is defined as late-onset multiple sclerosis (loms). the incidence and prevalence of ms including loms vary geographically. the aim of...

The prevalence of Hypoderma spp. in yaks grazed in the east of Qinghai province was investigated in 2008. In this area, the prevalence in young yaks (1- to 3-year-old) was very high at 82.2-98.7%, whilst in adult yaks (4-year-old and older), the prevalence was 42.4-50.6%. The seasonal development and migration pattern of Hypoderma larvae in yak bodies was found to be similar for different locat...