Research Article

Molecular Identification and Quantification of Tetracycline and Erythromycin Resistance Genes in Spanish and Italian Retail Cheeses

Table 4

Tetracycline and erythromycin resistance genes detected by conventional PCR in Spanish and Italian cheeses.

CheeseGene
Tetracycline resistance geneErythromycin resistance gene
tet(K)tet(L)tet(M)tet(O)tet(S)tet(W)erm(B)erm(F)

Spanish cheeses
 Cabrales*+++++ +
 Zamorano*+++++ +
 Majorero*+ +
 Mahón+
 Torta del Casar*++++ +
 Manchego+ +
 Ibores*+++ +
 Garrotxa++ +
 De La Mesta*++++++ ++
 Ibérico++ +
Italian cheeses
 Gorgonzola “dolce” +
 Gorgonzola “piccante”+ ++
 Caprino*+++ ++
 Quartirolo Lombardo++
 Pecorino Sardo*++++
 Grana Padano* ++
 Montasio* ++
 Monte Veronese*+ ++
 Asiago*+++++ ++
 Taleggio*+ ++

Cheeses made from raw milk.