However, such strategies have
failed to prevent the spread of YHV and WSSV diseases. Ever since,
a large-scale transition to farming specific pathogen free (SPF) Pacific
white shrimp (Litopenaeus vannamei) instead of P. monodon occurred
in the early 2000s (Wyban, 2007), and this species currently accounts
for over 98% shrimp cultured in Thailand (FAO, 2010).