Methicillin-Resistant Staphylococcus aureus (MRSA) in Artisanal Cheeses in México

Table 1

Staphylococcus aureus biotype distribution in Mexican artisanal cheese.

Biotype	n	Fresco	Requeson	Cotija	Adobero	Oaxaca
Host-specific ecovars
Human ecovar	—	—	—	—	—	—
Human ecovar hemolytic	7 (15.9)	4	—	1	2	—
Poultry ecovar	2 (4.5)	1	1	—	—	—
Bovine ecovar	—	—	—	—	—	—
Ovine ecovar	—	—	—	—	—	—
Nonhost-specific (NHS) biotypes
K − β + CV: C^∗	7 (15.9)	2	2	—	2	1
K − β + CV: A^∗	5 (11.4)	1	1	—	2	1
K + β − CV: A^∗	14 (31.8)	2	2	3	5	2
K + β + CV: A^∗	7 (15.9)	1	1	3	1	1
K − β − CV: C^∗	2 (4.5)	—	—	2	—	—

^∗Abbreviations are derived from staphylokinase (K), β-haemolysin (β), and crystal violet growth type (CV). ^∗∗NHS biotypes in this study correspond to the following: K − β + CV: C (biotype A), K − β + CV: A (biotype β), K + β − CV: A (biotype C), K + β + CV: A (biotype D), and K − β − CV: C (biotype E).