| daggerblade grass shrimp (palaemonetes pugio): a reservoir host for yellow-head virus (yhv). | yellow-head virus (yhv) is a major pathogen in penaeid shrimps. we surveyed 13 crustacean species in eight families from two orders that are commonly found in the mississippi coastal area and freshwater environments as potential reservoir or carrier hosts of yhv. using semi-nested polymerase chain reaction (pcr) on relatively small sample sizes, we did not detect any natural infection. however, when the daggerblade grass shrimp, palaemonetes pugio, and the blue crab, callinectes sapidus, were ex ... | 2009 | 19409902 |