POPM 4230 Lecture Notes - Lecture 4: Bone Density, Spinal Cord Compression, Coccidiosis

• School: University of Guelph
• Department: Population Medicine
• Course: POPM 4230
• Professor: Terri O' Sullivan

Document Summary

Acute = disease or condition with a rapid onset and a short, severe course. Culling = pre-mature removal from the flock before completion of the production cycle. Morbidity = illness, diseased condition or state vs. mortality = death. Virulence = degree of pathogenicity of a microorganism as indicated by the severity of disease produced and the ability to invade the tissues of the host. A metabolic disease of (young) laying hens housed in conventional cages. Due to a decrease in bone mineral density. ~ 3 types of long bones in avian spp; cortical (structural) = trabecular bone (spindles of bones = fill in meselayer cavity), medullary bone w. ca production for egg formation. Characterized by an inability to stand and fragile bones (~usually peak production ~31-33wks) It is mainly observed in young laying hens reared in conventional cages during peak production. Affected birds lie down and stop eating.