Incidence of Cyclospora and Cryptosporidium in Waters Distributed to Small Drinking Water Systems in Puerto Rico G I Ramírez toro1, G. Robinson2, R M Chalmers2, H A Minnigh3

1-CECIA, Interamerican University of Puerto Rico. 2-Public Health Wales, Swansea, Wales, UK.

3-The Gabriella and Paul Rosenbaum Foundation, Chicago, IL.

Abstract

Background

Materials & Methods Discussion

References

Mean Indicator Densities and Percent Occurrence

of Cryptosporidium and Cyclospora

Crypto and Cyclo Occurrence is

percent of all samples positive

Results

Indicator

Cryptosporidium Cyclospora

N Mean Std.

Deviation N Mean Std. Deviation

TC Negative 8 303 432.295 8 1653 3405.335

Positive 3 3700 5474.486 3 100 .000

Thermotolerant

Coliforms

Negative 8 66 46.579 8 66 46.579

Positive 3 100 .000 3 100 .000

E.coli Negative 8 78 41.662 8 78 41.662

Positive 3 100 .000 3 100 .000

Enterococci Negative 8 156 343.342 8 269 452.404

Positive 3 340 571.577 3 40 51.962