Epizootiology of late summer and fall infections of oysters by Haplosporidium nelsoni, and comparison to annual life cycle of Haplosporidium costalis, a typical haplosporidian.

Andrews, J. D.
J. Shellfish Res.
In Virginia, H. nelsoni infections can be divided into early-summer and late-summer acquisitions that result in quite different mortality patterns of oysters. The late-summer infections of H. nelsoni exhibit patterns of incubation and mortality similar to those of H. costalis . The value of life-cycle studies of H. costalis as a typical haplosporidan is noted. The scarcity and dormancy of spores and the often long periods of obscure infections in H. nelsoni tend to make infection experiments difficult.

Cambridge Scientific Abstracts