Summary of prevalence and characteristics of ESBL/AmpC enzymes found in the Dutch broiler production chain between June 2009 and December 2010.

GPS = Grandparent Stock, PS = Parent Stock. More details about the data displayed in grey are given in Figure 1.*With the primers used to sequence blaCTX-M-2 no distinction can be made between blaCTX-M-2 and blaCTX-M-97.†With the primers used to sequence blaSHV-12 no distinction can be made between blaSHV-12 and blaSHV-129.‡blaTEM-20 with silent mutations +144G->A, +480C->T and +723A->G compared to reference sequence blaTEM-20 Y17581 (nucleotide position according to amino acid count at www.lahey/studies.org).GPS为祖代菌种（Grandparent Stock），PS为亲本菌种（Parent Stock）。 图1中给出了以灰色标注的数据集更多细节信息。 * 使用用于测序blaCTX-M-2的引物时，无法区分blaCTX-M-2与blaCTX-M-97。 † 使用用于测序blaSHV-12的引物时，无法区分blaSHV-12与blaSHV-129。 ‡ 相较于参考序列blaTEM-20 Y17581，blaTEM-20存在+144G→A、+480C→T及+723A→G三处同义突变（核苷酸位置依据www.lahey/studies.org网站的氨基酸计数规则确定）。