. 2019 Jul 1;33(1):157–165. doi: 10.5713/ajas.19.0205

Table 3.

Changes in bacterial counts on beef from culled Hanwoo cows slaughtered at different ages during dry aging

Variable	Age (month)	Aging period (d)					SEM

		0	20	24	40	50
Total plate count (log CFU/g)	60	1.88^C	3.78^B	4.66^A	4.60^A	5.38^A	0.35
Total plate count (log CFU/g)	80	1.89^C	3.86^B	4.01^AB	4.17^AB	4.36^A	0.26
Lactic acid bacteria (log CFU/g)	60	1.65	2.26	1.68	1.69	1.41	0.08
Lactic acid bacteria (log CFU/g)	80	1.73	2.29	1.70	1.76	1.21	0.10
Total coliform (log CFU/g)	60	ND^C	1.58^B	2.81^A	2.97^A	3.30^A	0.19
Total coliform (log CFU/g)	80	ND^C	1.60^B	2.56^A	2.76^A	3.24^A	0.18
Volatile basic nitrogen (mg %)	60	9.13^B	11.02^A	11.65^A	13.46^A	13.22^A	0.51
	80	8.50^B	10.08^A	12.99^A	12.75^A	13.70^A	0.64

Data are presented as mean value (standard error).

SEM, standard error of the mean; CFU, colony-forming unit; ND, not detected (data were adjusted to 0.01 log CFU/g prior to statistical analysis).

^A–C

Mean values are significantly different according to aging period (p<0.05).