The temporal and spatial interaction of fowl cholera outbreaks in turk
eys, occurring between August 1985 and July 1986 in California, were e
xamined, During this period a total of 53 outbreaks occurred in 720 fl
ocks at risk, Forty-nine of these flocks were examined in a previous c
ase-control study designed to elucidate outbreak risk factors, In this
study the spatial and temporal distributions of those outbreaks were
examined in order to test for the possibility of transmission between
neighboring flocks. Results showed outbreak flocks were clustered in t
ime and space when critical times (7-30 days) and distances (from 1.6
to 16 kms.) were examined using the Knox test. These results provide a
dditional information on the transmission of fowl cholera among turkey
premises and support the need for time-space clustering methodologies
in epidemiologic investigations.