Temporal and spatial dynamics of Cryptosporidium parvum infection on dairy farms in the New York City Watershed: a cluster analysis based on crude and Bayesian risk estimates

Table 1 Characteristics of the data used in the study

Season	N samples^a	N positive^b	CP^c	Range of CP^d	BP^e	Range of BP^f
Spring	150	23	15	0-100	10	0-37
Summer	182	47	26	0-100	19	0-48
Winter	175	20	11	0-64	9	0-51

^aNumber of pre-weaned calves tested with the flotation method
^bNumber of pre-weaned calves positive for C. parvum with the flotation method
^cCrude average prevalence of C. parvum among pre-weaned calves expressed as percent
^dRange of crude within-herd prevalence of C. parvum expressed as percent
^eBP Bayesian average prevalence of C. parvum among pre-weaned calves expressed as percent
^fRange of Bayesian within-herd prevalence of C. parvum expressed as percent

ISSN: 1476-072X