micro eye diseases

what are the eyes defenses? (4)

aqueous fluid, oil, and mucus from lacrimal gland

lysozyme in tears

definition of conjunctivitis

infection of the conjunctiva

what are the four infection types of conjunctivitis?

bacterial, viral, allergy, neonatal

what are the symptoms of bacterial conjunctivitis?

milky discharge from the eye

what bacteria causes bacterial conjunctivits?

moraxella, s. aureus, streptococcus pneumoniae

prevention and treatment of bacterial conjunctivitis

Hygiene and levofloaxcin/gatifloaxcin eye drops

what are the symptoms of viral conjunctivitis?

clear exudate (fluid with cells)w

what virus causes viral conjunctivitis?

adenovirusw

prevention and treatment of viral conjunctivitis

Hygiene and no viral treatment but antibiotics are given because the symptoms may be similar

what are the symptoms of allergy conjunctivitis?

clear fluid excretion from eye

what is neonatal conjunctivitis ?

infection of the conjunctiva in babies less than 28 days old

what bacteria causes neonatal conjunctivitis ?

chlamydia trachomatis and neisseria gonorrhea

prevention and treatment of neonatal conjunctivitis

screening mothers, adding antibiotics/silver nitrate to babies’ eyes and topical/oral antibiotics

definition of trachoma

infection of epithelial cells of the eye that can cause blindness and scarring

what bacteria causes trachoma?

chlamydia trachomatis

prevention and treatment of trachoma

hygiene and topical erythromycin

keratitis definition

more serious bacterial infection than conjunctivitis that can cause complete corneal destruction

what virus/bacteria/amoeba causes keratits?

acanthamoeba: amoeba in fresh water sources

HSV-1 (simple herpes virus): misdirected oral herpes

any microbe after eye trauma

prevention and treatment of keratitis

no prevention and topical trifluridine for HSV-1 and antimicrobials for misc. microbes

definition of River Blindness

parasitic infection that is common in Africa, Asia and Latin American that travels through the bloodstream and causes eye tissue damage

what parasite causes river blindness?

onchocerca volvulus which is carried by black flies

what bacterial infection causes river blindness?

wolbachia which causes tissue damage in eye

prevention and treatment of river blindness

avoiding black flies and removal of parasite physically