Question

Saprolegnia parasitica causes __________.

• A. White mold disease in beans
• B. Psittacosis in birds
• C. Salmon disease in fishes
• D. Schistosomiasis in human beings

Hint:

This water mold is notorious for infecting the skin, gills and eggs of freshwater fish.

Answer 1

The Correct Option is C

Step 1: Saprolegnia is a genus of water molds (Oomycetes) that commonly infects fish and fish eggs in freshwater habitats.

Step 2: Saprolegnia parasitica in particular is well known as a pathogen of salmon and other freshwater fish, producing cottony fungal growths on skin, gills and eggs, a condition often called saprolegniasis or "salmon disease".

Step 3: White mold disease in beans is caused by Sclerotinia sclerotiorum, psittacosis in birds is a bacterial disease caused by Chlamydia psittaci, and schistosomiasis is a parasitic worm disease of humans, none of which are linked to Saprolegnia.

Step 4: So the correct answer is salmon disease in fishes.