. 2023 Aug 25;18(8):e0290444. doi: 10.1371/journal.pone.0290444

Table 5. Detection of α-CoV in pharyngo-tracheal swabs and feces in SARS-CoV-2-negative mink farms in France.

		SARS-CoV-2 RNA RT-qPCR on	CoV RT-PCR of pol gene on
		Pharyngo-tracheal swabs	Pharyngo-tracheal swabs ^a	Pools of feces ^a
Farm	Nb of buildings	Positive/tested (%)	Positive/tested (%)	Positive/”exploitable” (%)
B	2	0/120 (0)	0/28^a (0)	Not tested
C	9	0/395 (0)	2/65^a (3.1)	1/25 ^a^,^b (4)
D	20	0/966 (0)	9/143^a (6.3)	2/23 ^a^,^c (8.7)

^a Randomized collection from different farm buildings

^b For farm B, of 56 pools tested, 31 samples tested negative for the presence of the beta-actin gene and were then considered as “unexploitable”. The prevalence was calculated as follows: samples that had tested positive for the presence of coronavirus RNA / total of “exploitable” samples *100.

^c For farm C, of 34 pools tested, 23 samples tested positive for the presence of the beta-actin gene and 11 tested negative (these 11 were then considered “unexploitable” for calculating the prevalence).