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Ophthalmology

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Cornea

Question
7 out of 52
 

A patient using contact lens develops corneal infection, laboratory diagnosis of acanthamoeba keratitis was established, The following is the best drug for treatment (LQ)



A Propamidine
B Neosporin

C Ketoconazole biguanide
D Polyhexamethylene

Ans. D Poly hexamethylene biguanide (PHMB)

Acanth amoebic keratitis - free living protozoan. It is exists in trophozoite and encysted form . Both Propamidine and PHMB are specific for Acanth amoebic keratitis

Mode of infections Q ­

1. Contact lens cleaning using home made saline (from contaminated tap water and saline tablets)

Diagnosis

1. ­Potassium hydroxide mount

2. Calcofluor white stain stains the cyst - bright apple green

3. Lactophenol cotton blue stained

4. Culture on non nutrient agar (E. coli enriched) may show trophozoites within 48 hours.

Treatment Q

1. A combination of propamidine Q isethionate (0.1 %) (Brolene) and polyhexamethylene Qbiguanid 0.02% drops.

Cornea Flashcard List

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