PMC

Maximum-parsimony trees constructed with different genome fragments of CCoVs and FCoVs. (a) Fragment of the M gene obtained with primer pair CCoV1a-CCoV2 (239 bp); (b) fragment of the S gene obtained with primer pair EL1F-EL1R (346 bp); (c) fragment of the M gene obtained with primer pair Can1F-CCoV2 (202 bp); (d) fragment of the S gene obtained with primer pair S5-S6 (694 bp). The trees are unrooted and are drawn to scale. Bootstrap values are not shown. The numbers 4, 10, 13, and 19 indicate specimen designations of the PCR products from the fecal samples analyzed.