{"product_id":"macconkey-agar-fertig-20-stk","title":"MacConkey Agar Prepared - 20 pcs.","description":"\u003cdiv class=\"productDescription\"\u003e\n\u003cp\u003eMacConkey medium is a selective medium for the preferential growth of Gram-negative bacteria. This is achieved by the addition of bile salts and crystal violet, which can largely inhibit the growth of Gram-positive bacteria. However, MacConkey is not suitable for obtaining pure cultures of Gram-negative bacteria from mixed samples containing Gram-negative and Gram-positive bacteria. Therefore, MacConkey does not serve as a purity control - for that purpose, a CLED plate, for example, should be used.\u003c\/p\u003e\n\u003cp\u003eMacConkey medium can also be used as a differential medium. The addition of neutral red serves as a pH indicator, which can, for example, show a decrease in pH during lactose utilization by a red coloration of the bacteria. With lactose-positive, red-colored bacteria, cloudy halos regularly appear, which are caused by the precipitation of bile salts as a result of the pH decrease.\u003c\/p\u003e\n\u003cp\u003eFor the cultural differentiation of Gram-positive and Gram-negative bacteria, the combination of CLED, MacConkey, and Columbia Blood-CNA is therefore always recommended (\"Beyaert system\", then additionally Sabouraud-G\/C for yeast detection).\u003c\/p\u003e\n\u003cp\u003eDownloads:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/aurosan.sharepoint.com\/:b:\/s\/AUROSAN_4Y\/IQDIp9F-Q_DTS615_R2O3FYlAX0ouvkNNG1YlYvxwLdxMuc?e=IyaJ6z\" title=\"Gebrauchsanweisung\"\u003eInstructions for use\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003cbr\u003e","brand":"Becton Dickinson GmbH","offers":[{"title":"Default Title","offer_id":56933251875148,"sku":"MD2473","price":8.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/1056\/9036\/files\/BC_Upload_93104382-6dc8-4480-a9e7-d0d1a315023e.jpg?v=1773255542","url":"https:\/\/aurosan-shop.de\/en\/products\/macconkey-agar-fertig-20-stk","provider":"aurosan-shop.de","version":"1.0","type":"link"}