Using Diagnostic Laboratory Records to Monitor Occurrence of Enteric Septicemia of Channel Catfish in Mississippi

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Abstract
Diagnostic laboratory information was used to monitor the temporal and spatial occurrence of enteric septicemia of catfish (ESC) in Mississippi. From 1980 through 1988, the Mississippi Cooperative Extension Service (MCES) entered information on 15,649 fish‐kill investigations into a computerized data base. Analysis of the records revealed the following trends and patterns. From 1980 through 1985, there was an increase in laboratory submissions and in the ESC proportional morbidity rate (PMR; proportion of diagnosed epizootics that were specific for ESC. However, from 1986 to 1988, although the total yearly number of laboratory submissions had stabilized, there was a decrease in the PMR of ESC cases. During the 9‐year interval, 427 producers from 56 counties had ESC diagnosed in their ponds. Twenty‐eight producers from four counties were responsible for about 40% of all ESC cases.

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