MIKROCYTOSIS( MIKROCYTOS MACKINI )IN THE UNITED STATES OF AMERICA
Follow-up report No. 1 (final report)
Information received on 7 May 2003 from Dr Peter Fernandez, Associate Administrator, Animal and
Plant Health Inspection Service, United States Department of Agriculture (USDA), Washington, DC:
End of previous report period: 18 July 2002 (see Disease Information , 15 , 127, dated 19 July 2002).
End of this report period: 7 May 2003.
In May 2002, mikrocytosis was identified in 2 feral oysters out of a total of 50 during routine surveillance of an oyster farming bay located in New Dungeness Bay, Washington. There was no report or sign of mortality or morbidity following examination of oysters at any time during the incident or the subsequent ongoing surveillance.
The source of agent remains unknown.
The status of M. mackini distribution in the United States of America has not changed since the initial report. Additional samples taken from commercial oyster hatcheries, nurseries, and brood stock repositories in Washington, Oregon and California were negative for M. mackini