Haplosporidium nelsoni causes multinucleate sphere unknown (MSX) in cultured and wild American oysters (Crassostrea virginica).
MSX is a federally reportable disease listed in the Reportable Diseases Regulations. This means that all suspect cases of the disease or detections of the pathogen must be reported to the CFIA.
Current as of: 2024-12-31
| Year | Date confirmed | Location | Animal type infected | Scientific Name |
|---|---|---|---|---|
| 2024 | December 20 | New Brunswick | American oyster | Crassostrea virginica |
| 2024 | November 25 | New Brunswick | American oyster | Crassostrea virginica |
| 2024 | November 18 | New Brunswick | American oyster | Crassostrea virginica |
| 2024 | October 30 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | October 16 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | October 7 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | October 7 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | September 25 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | September 25 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | September 25 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | September 12 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | September 10 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 27 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 26 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 26 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 14 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 14 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 8 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 7 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 7 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 6 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | August 2 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | July 26 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | July 25 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | July 25 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | July 25 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | July 25 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | July 23 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | July 23 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | July 23 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2024 | July 11 | Prince Edward Island | American oyster | Crassostrea virginica |
| 2016 | May 3 | Nova Scotia | American oyster | Crassostrea virginica |
| 2014 | August 8 | Nova Scotia | American oyster | Crassostrea virginica |
| 2013 | September 13 | Nova Scotia | American oyster | Crassostrea virginica |
| 2013 | September 6 | Nova Scotia | American oyster | Crassostrea virginica |
| 2013 | July 26 | British Columbia | Pacific cupped oyster | Crassostrea gigas |
| 2013 | June 3 | Nova Scotia | American oyster | Crassostrea virginica |
| 2012 | December 19 | Nova Scotia | American oyster | Crassostrea virginica |
| 2012 | July 20 | Nova Scotia | American oyster | Crassostrea virginica |