4.African horse sickness virus (AHSV) causes a non-contagious, infectious insect-borne diseaseof equids which is named African horse sickness (AHS) and is endemic in many areas of sub-Saharan Africa.
5.A contagious diseaseof the conjunctiva and cornea, caused by the gram-negative bacterium Chlamydia trachomatis and characterized by inflammation, hypertrophy, and formation of granules of adenoid tissue. It is a major cause of blindness in Asia and Africa.
