BIOL 4124 : Exam 3 Study Guide Spring 2016
Document Summary
Exam 3 study guide: upper respiratory tract infections, structures & diseases, naso-pharynx region, common cold (rhinitis, causes, bacterial: n/a, viral: Binds to icam-1 of nasal epithelial cells. Viral envelope protein binds to glycoproteins on the cell. Invades the cells, and causes inflammation and others. Symptomatic: anticongestants, analgesics, and antibiotics to cause quick recovery. Otitis media: other causes : adenoviruses, myxoviruses, coxsackie a & b viruses, presentation of infection, symptoms: Slight fever (<102f: mode of transmission, by air droplets or contaminated hands, pathogenesis, classical. Reaches the cilia on respiratory cells, and attaches to them. Progeny is released to the neighboring cells. Virus is shed: cell damage and infection spreads. Host defenses activated, macrophages, and phagocytes recruited to the site of inflammation. Virus cleared by immune system and low grade over growth of commensals. Fluid becomes purulent, and the body recovers from the infections: general complications, acute bacterial sinusitis.
