Keratitis is a condition that affects the eyes of cats, and it may become a chronic disease that will ultimately affect the pet's vision. The condition will manifest through excessive tearing and ocular discharges. Keratitis can be treated once detected.he condition can dry the cornea and for this reason, it is also known as 'dry eye.' The causes of keratitis are not precisely determined, but certain factors may be suspected: 1  The feline herpes virus. 2  A foreign object that reaches the cornea. 3  An eye injury.
Quick Answer. The incubation period for head lice is between 6 and 9 days, or roughly one week. After hatching, young lice (nymphs) become adults in about 7 days. These adult lice can live on a human head for up to 30 days. Continue Reading.
Head lice are the most common form of lice that are seen in infestations, especially among children between the ages of 4 and 13. Head lice only survive on human blood. Without a human hosts, most lice will only live for a maximum of 48 hours.This is why sealing clothes and toys after infection in a plastic bag is a great way to get rid of lice. Lice on a human host can survive two or three weeks. However, living lice lay eggs.ead lice are the most common form of lice that are seen in infestations, especially among children between the ages of 4 and 13. Head lice only survive on human blood. Without a human hosts, most lice will only live for a maximum of 48 hours.