Volume 11, Number 2—February 2005
Research
Sporadic Cryptosporidiosis Decline after Membrane Filtration of Public Water Supplies, England, 1996–2002
Stella Goh*, Mark Reacher†
, David P. Casemore‡, Neville Q. Verlander§, André Charlett§, Rachel M. Chalmers¶, Margaret Knowles#, Anthony Pennington*, Joy Williams*, Keith Osborn**, and Sarah Richards††
, David P. Casemore‡, Neville Q. Verlander§, André Charlett§, Rachel M. Chalmers¶, Margaret Knowles#, Anthony Pennington*, Joy Williams*, Keith Osborn**, and Sarah Richards††
Table A4
Speciation of Cryptosporidium isolates
| Isolates | n (%) |
||
|---|---|---|---|
| Before membrane filtration |
After membrane filtration |
Before and after membrane filtration |
|
| January 1, 1998–February 29, 2000 | March 1, 2000–August 31, 2002 | January 1, 1998–August 31, 2002 | |
| Total speciated | 68 (100) | 16 (100) | 84 (100) |
| C. hominis | 1 (1.5) | 3 (18.8) | 4 (4.8) |
| C. parvum | 57 (83.8) | 13 (81.2) | 70 (83.3) |
| Not determined | 10 (14.7) | 0 (0) | 10 (11.9) |
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