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Investigation of the impact of simulated commercial centrifugation and microfiltration conditions on levels of Mycobacterium avium ssp. paratuberculosis in milk
Author(s) -
GRANT IRENE R,
WILLIAMS ALAN G,
ROWE MICHAEL T,
MUIR D DONALD
Publication year - 2005
Publication title -
international journal of dairy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.061
H-Index - 53
eISSN - 1471-0307
pISSN - 1364-727X
DOI - 10.1111/j.1471-0307.2005.00201.x
Subject(s) - microfiltration , paratuberculosis , centrifugation , raw milk , filtration (mathematics) , chromatography , microbiology and biotechnology , food science , dairy industry , mycobacterium , chemistry , biology , bacteria , membrane , biochemistry , statistics , mathematics , genetics
The potential for physical removal of Mycobacterium avium ssp. paratuberculosis (M. paratuberculosis ) from milk by centrifugation and microfiltration was investigated by simulating commercial processing conditions in the laboratory by means of a microcentrifuge and syringe filters, respectively. Results indicated that both centrifugation of preheated milk (60°C) at 7000 × g for 10 s, and microfiltration through a filter of pore size 1.2 µm, were capable of removing up to 95–99.9% of M. paratuberculosis cells from spiked whole milk and Middlebrook 7H9 broth suspensions, respectively. Centrifugation and microfiltration may therefore have potential application within the dairy industry as pretreatments to reduce M. paratuberculosis contamination of raw milk.