Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Mar 4;20(5):1395. doi: 10.3390/s20051395

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Enzyme reaction based colorimetric detection of E. coli O157:H7 from milk samples: (a) Recovery concentration of bacteria evaluated by colony counting using a selective agar medium (blue line) was compared with the absorbance of the assay solution (red bar) and final color response (inset digital images) by enzymatic reaction; (b) Target bacteria concentration dependent increase of absorbance was evident for β-GAL producing E. coli O157:H7, while the absorbance value for the negative control (NC) bacteria (S. aureus) tested at 10⁴ CFU/mL was negligible.