Avaliação do leite do teste de Tamis e seu efeito sobre a qualidade do leite

Marcelo Ament Giuliani Dos Santos,Weber Vilas Boas Soares,Luiz Carlos Roma Júnior,Rodrigo Giglioti,Thatiane Mendes Mitsunaga,Lívia Castelani

doi:10.21708/avb.2022.16.1.10334

Abstract

Consumers demand for food safety affects dairy industry, restraining the sector to adapt to milk quality parameters established by legislation, such as somatic cell count (SCC) and standard plate count (SPC). Good agricultural practices have positive impact over these parameters, especially Forestripping Milk (FSM), which consists of observing the first milk streams collected in a dark-bottomed mug for identification of clinical mastitis. These first milk streams have high somatic cells count and bacteria. Therefore, the aim of this study was to evaluate the characteristics of milk from FSM, such as SCC and SPC values, and its impacts on milk quality of the cooling tank through simulating contamination. Fourteen dairy farms and one experimental farm were evaluated for SCC and SPC parameters of FSM. It was observed that there was no statistically significant difference for SCC and SPC between milk samples from the cooling tank and cooling tank simulating the inclusion of milk from FSM. Statistically significant difference for somatic cell score (SCS) and SPC was observed when tanks were classified by SCC. In addition, difference in SCS was observed between morning and afternoon milking. The collection of first milk streams can contribute to decrease in SCC and SPC of milk in the cooling tank. FSM must be practiced by all dairy farmers as milking management, to assist in clinical mastitis diagnosis and improve milk quality.

Highlights

Milk is considered a nutritionally complete food capable of acting on the body providing growth and regulating nervous and immune systems
In Stage 1, it was observed that there was no statistically significant difference for somatic cell count (SCC) and standard plate count (SPC) between milk samples from the cooling tank and the cooling tank simulating the inclusion of milk from FMS (Table 1)
From the classifications of farms by values of parameters determined by Normative Instruction (NI) 76, statistically significant differences were observed (P = 0.04), considering the somatic cell score (SCS) of tanks with high SCC

Summary

Introduction

Milk is considered a nutritionally complete food capable of acting on the body providing growth and regulating nervous and immune systems. The use of good agricultural practices (GAP) has positive impact on these parameters and should be carried out from the beginning of milking until milk processing Among these good practices, Forestripping Milk (FSM) or dark-bottomed mug test stands out. This test is used for the diagnosis of clinical mastitis and consists of observing the first milk streams collected in a dark-bottomed screened mug to evaluation of visible abnormalities in milk, such as presence of lumps. It can assist in decreasing bacterial count and somatic cells, which are naturally present in the first milk streams (SANTOS; FONSECA, 2019)

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