Pathogenic vs. Nonpathogenic Strains

§Authors: Tom J., Stuart C. Killick

§Scientists wanted to determine whether host mortality was dependent on pathogenic strains and how pathogenic some strains are less severe than others

§Those groups of Daphnia (water fleas) fending off the most aggressive strain (SP1) had the most mortality. Strains on this graph were arranged on the X-axis, left being the least pathogenic and right being the most pathogenic.

§ Results showed that there are strains that are more pathogenic than others. Sp1 is the most pathogenic and Sp8 is the least pathogenic.

§Control groups (wild strains) Sp x 2 and Sp13 x 2 showed that as a whole when Daphnia is infected with Pasteuria ramosa there is ~40% of survival.