Effects of storage temperature and milk sample age on the somatic cell count of goat milk

Guilherme Nunes De Souza,Ueslei Campos Guerra,Márcio Roberto Silva,Andrea Freguglia Bruno,Lillian Lopes Marinho

doi:10.5935/2238-6416.20120021

Abstract

In goat milk, storage temperature and milk age has been identified as one of possible factors affecting the somatic cell count (SCC). To establish the effect of the storage temperature and milk age used for SCC in goat milk, counts were performed on 320 aliquots of milk sample from 20 goats using Somacount 300 (Bentley Instruments). The milk samples were preserved with bronopol, kept at 5o, 10o, 20o and 30oC and analyzed 1, 3, 5 and 7 day post-collection. The temperature storage and milk age did not modify the SCC of the milk samples significantly (P>0,05). The results of SCC in milk samples incubated at 10o, 20o and 30oC were slightly lower than those incubated at 5oC. Considering SCC variation lower than 9%, the results of SCC under experimental conditions can be acceptable for monitoring both the udder health and milk quality in dairy goats.

Highlights

The somatic cell counts (SCC) are widely used monitors of udder health and milk quality in dairy goat industry (HAENLEIN, 2002; PAAPE et al, 2007)
SCC of goat milk were from 25 to 27% lower when the eletronic equipment was calibrated with cow milk standard. (ZENG, 1986; ZENG et al.; 1999)
The eletronic equipments calibrated with cow milk standard can be used to SCC in goat milk with until 2,549,000 cell mL-1 (ARCURI et al, 2004)

Summary

Introduction

The somatic cell counts (SCC) are widely used monitors of udder health and milk quality in dairy goat industry (HAENLEIN, 2002; PAAPE et al, 2007). In milk-testing laboratories, the most commonly used method of enumerating SCC is the fluoro-optical eletronic or counter method. This method is based on the formation of a fluorescent complex when ethidiubromide dye penetrates the cell and comes in contact with nu clea r DNA (INT ERNAT IONAL DAIRY FEDERATION, 1995). SCC of goat milk were from 25 to 27% lower when the eletronic equipment was calibrated with cow milk standard. The eletronic equipments calibrated with cow milk standard can be used to SCC in goat milk with until 2,549,000 cell mL-1 (ARCURI et al, 2004)

Methods

Results

Conclusion