Microbiological Aspects of Cold Cleaning with an lodophor of Milk Pipeline Installations

Self Cite

The results of bacteriological examination of rinses of the entire systems of 12 pipeline milking machines were compared with a similar examination of the milk collected while they were used for milking. The machines were cleaned in three different ways and showed varying degrees of complexity. There was a close correlation between the results when the milk was collected with the maximum of cleanliness during milking. This is attributed to the localization of most of the micro-organisms present in the milking machine in the junctions and complex parts of the machine and not on the surface of the equipment, so they are removed with the same efficiency by cold water or warm milk. The number of micro-organisms retrieved by water during successive rinses (or by the milk during milking) decreased at a rate which depended either on the level of initial contamination of the equipment, its design or on the types of micro-organisms present. Recommendations are made for the interpretation of the results of rinsing.

Section: Discussionmentioning

confidence: 53%

Section: Cluster Rinsesmentioning

confidence: 99%

mentioning

confidence: 94%

mentioning

confidence: 99%

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Bacteriological Examination of Pipeline Milking Machines by Rinsing the Entire System

Richard¹

1981

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“…From a practical point of view, there is a need for an interpretation of the results of sampling surfaces in terms of milk contamination. It was previously demonstrated that, provided sampling is done according to particular precautions, the number of bacteria found on the surface of milking machines cleaned with present methods is negligible (Richard 1981). This is not the case for the contamination of milk by teat skin (Piton & Richard 1982).…”

Section: Discussionmentioning

confidence: 79%

Semi‐log model for interpreting the results of swabbing surfaces naturally contaminated

Richard¹,

Piton²

1986

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Two mathematical models for depicting microbial depletions during six consecutive swabbings of refrigerated tank wall and teat skin were tested. Although a second degree polynomial equation gave a better adjustment of the data, a first degree equation was preferred to calculate the total numbers of micro-organisms possibly retrieved from surfaces by swabbing. This model was used for estimating the level of milk contamination by teat skin.

Thermal resistance of partially purified proteinase of Pseudomonas fluorescens P‐26

Uplacksh

Mathur

Malik

1994

Heat resistance of the Pseudomonas fluorescens P-26 proteinase in terms of D-value was studied in whole milk, skim milk, whey and 0.05 mol l-1 phosphate buffer at 72.5, 130, 135, 140, 145 and 150 degrees C subsequent to its partial purification through (NH4)2 SO4 precipitation (45-65% saturation) and solvent fractionation with 1.0 to 2.0 volumes of isopropanol. The D-value was maximum for the proteinase at all temperatures when determined in whole milk (D150 = 0.088).