Epizootiological observations were made on natural outbreaks of diarrhea which occurred in infants of mouse colonies of ddY and NIH(gpc) strains. The incidence was higher in NIH than in ddy mice, and was the highest in the first litters decreasing with the seriation of the litter, and disappearing at the third and fifth litters in ddY and NIH mice, respectively. In both strains, onset of the disease was seen at 7 to 13 days of age, and about 63% of affected litters showed diarrhea 8 to 10 days

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... fter birth. In usual, the younger the sucklings were at onset, the longer the diarrhea lasted. Large-sized litters were more frequently affected than small-sized ones. Exp. Animals, 24(1), 31-35, 1074