Multiplicação microbiana no leite cru armazenado em tanques de expansão direta

Reche, Natália Luiza Machado; Neto, André Thaler; D`Ovideo, Loredana; Felipus, Nadine Cristina; Pereira, Luana Cristina; Cardozo, Leonardo Leite; Lorenzetti, Robson Guilherme; Picinin, L.C.A.

doi:10.1590/0103-8478cr20140542

Cited by 12 publications

(7 citation statements)

References 10 publications

(11 reference statements)

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“…However, regardless of the milking type, the evaluated milk samples presented TBC above the limit recommended by the current legislation (13) for the region and period of the study. This fact may be a reflection of several factors such as the presence of mastitis, inadequate milking hygiene practices and/or inefficient storage/cooling conditions on the farm, as well as the use of poor quality water (14) .…”

Section: Resultsmentioning

confidence: 99%

La influencia del método de ordeño, las condiciones de almacenamiento y el recuento de células somáticas en la calidad de la leche cruda en tanques

Bezerra

Oliveira

Sales

et al. 2020

Rev. Mex. Cienc. Pecu.

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The objective of this study was to evaluate the influence of the milking method, the storage conditions and the SCC (Somatic Cell Count) increase on the quality of raw milk. Monthly evaluations were performed out over a year in 21 tanks by monitoring the refrigeration temperature and the storage time of the milk in the tank. The tanks were grouped into three temperature levels. Milk storage time intervals were established in each tank: up to 24 h of storage; between 24 and 48 h; and above 48 h. The effect of SCC on the composition was evaluated in three categories: Low SCC; Medium SCC; High SCC. In the analyzed period, 10.8 % presented low SCC, followed by 46.5 % with medium SCC, while 42.7 % had high SCC. There was a positive correlation between SCC and protein, and a negative correlation between SCC and lactose. It is concluded that the milking method does not influence the microbial contamination of the milk; however, longer storage time and increased temperature influenced an increase in microorganism counts in milk. In evaluating the hygienic/sanitary quality of the milk, 42.7 % had high SCC and the total bacterial counts presented values above the values recommended by legislation.

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Section: Resultsmentioning

confidence: 99%

La influencia del método de ordeño, las condiciones de almacenamiento y el recuento de células somáticas en la calidad de la leche cruda en tanques

Bezerra

Oliveira

Sales

et al. 2020

Rev. Mex. Cienc. Pecu.

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“…mL -1 ) para contagem padrão em placas (CPP), ou seja, quantificação de bactérias mesófilas aeróbias. Valores inferiores ao estabelecido pela legislação também foram encontrados por Reche et al [19] que, ao avaliar a contagem bacteriana total do leite do conjunto de 19 tanques refrigerados de expansão direta, encontraram valores médios de 4.96 log 10 UFC.mL -1 . A literatura registra que 95% dos problemas com altas contagens de microrganismos mesófilos aeróbios são originários de insuficiências na higiene da ordenha, como lavagem e sanitização inadequada de utensílios e sistema de ordenha deficitária, os quais podem estar associados a mau resfriamento do leite, mas que raramente a vaca é fonte de problema [13].…”

Section: Discussionunclassified

Staphylococcus aureus and Mesophilic Aerobic Bacteria Quantification in Hygienization Process of Milking Equipment

Bohrz

Webber

Vancin

et al. 2019

Acta Scientiae. Vet.

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Background: Milk's composition is an excellent substrate for microorganism's multiplication. Presence of Staphylococcus aureus and aerobic mesophilic bacteria are one of the most common problems in dairy farms. On dairy industry's and milk farms Clean in Place (CIP) system higyenization are commonly used, then the cleaning occurs as a closed process, for better results sanitizans are applied, in order to obtain a safety food. This project aim to evaluate Staphylococcus aureus and aerobic mesophilic bacteria reduction after two milking higyenization process. Materials, Methods & Results:This research was done on a Rio Grande do Sul North Milk farm, with mechanized milking and Clean in Place system for cleaning. For liners and CIP tubes higyenization commercial products as Sodium Hipoclorite 3% and phosphoric acid 11.3% are used for detergency, and peracetic acid 5% for sanitization. Milk bunk tank are higyenized with sodium hypoclorite 3.8% alcalin detergent. After higyenization steps liners, CIP's water process, bulk milk tank and milk set were collected. At process 1, liners and CIP water were collected after milking, detergency and sanitization that occurred immediately at the detergency's finish, while process 2 the sanitization was realized 8 h after detergency, before following milking. Cooling milk bulk tank was collected before and after detergency, and milk set after milkings Convencional microbiology were used to count and results in log10 UFC.cm -2 . In CIP water's after process 1 was 3.81 log 10 reduction to aerobic mesophilic bacteria (P > 0.05) and reducing 4.51 log 10 (P = 0.03). Meanwhile there was no significant reduction for mesophilic aerobic bacteria and S. aureus on the others samples (liners, bulk milk tank and milk set). Discussion: This results show the maintenance of milking machine contamination, and that even bacterial load reduced among hygienization steps this was not significant, suggesting that deteriorate and pathogenic microorganisms can remain on milk produced. Highlights are teat taps of milking machine as the major cause of contamination among cows. The results are worrying because Staphylococcus aureus contamination, once this bacteria causes alimentar diseases, even after higyenization process, which can damage public health that can reflect milk chain economically. Since amount of this microorganism found in milk is already sufficient to synthesize enterotoxins. In addition, resistance to disinfectants is another concern, as it may result in resistance to antimicrobial agents. So reduction of bacteria level among cleaning steps there was no significance, once the products and equipments on dairy and farms act as a constant elimination point of deteriorate and pathogenic microorganisms for the final product, milk. The results obtained aim to aprimorate. hygienization processes on milk chain, in order to obtain a hygienic sanitary good product.

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“…Dentre as razões que expli ca riam esta alta contaminação bacteriana nas amostras de leite, destacam-se: a não rea lização do pré-dipping; a inadequada temperatura Tabela 2 -Contagens médias (em UFC/mL) do total de bactérias (CBT) e de bactérias psi crotróficas (CBP) de amostras de leite cru obtidas em unidades produtoras presentes na mesorregião oeste paranaense, de acordo com os sistemas de ordenha e de refrigeração (N = 50) dos resfriadores; a ineficiente higiene dos equipamentos de ordenha, e; a introdução de leite cru proveniente de ordenhas subsequen tes, causando oscilação de temperaturas do produto armazenado no resfriador (RECHE et al, 2015). A média das contagens de CBP foi de 9,8 x 10 5 UFC/mL, sendo que uma fra ção expressiva de unidades produtoras (60%) apresentou amostras contaminadas por bactérias psicrotróficas em contagens acima de 10 5 UFC/mL.…”

Section: Sistemasunclassified

Qualidade do leite cru refrigerado e características da produção leiteira na mesorregião oeste paranaense, Brasil

et al. 2018

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RESUMOO presente trabalho objetivou avaliar o perfil tecnológico e a qualidade do leite cru refrigerado produzido na mesorregião oeste paranaense, região sul do Brasil, bem como a adequação do produto aos padrões de qualidade requeridos pela legislação brasileira. O estudo consistiu na avaliação de 50 unidades produtoras de leite; as amostras de leite cru foram coletadas a partir do tanque de refrigeração e foram realizadas análises de contagem bacteriana total (CBT), contagem de bactérias psicrotróficas (CBP) e contagem de células somáticas (CCS). Aos produtores, foi aplicado um questionário referente ao sistema e manejo de ordenha, sistema de refrigerador, conhecimento técnico dos funcionários e informações sobre o trans porte do leite à indústria de processamento. A CCS estava acima do limite legal em 47,5% das amostras avaliadas, com contagem média de 9,8 x 10 5 UFC/mL; 46% das amostras estavam igualmente acima dos limites máximos previstos para CBT. O sistema de ordenha mais comumente encontrado (em 50% das unidades produtoras) foi o de ordenha mecânica tipo "balde ao pé" e o modelo de tanque de refrigeração prevalente foi o de expansão (em 70% das unidades). A ordenha manual apresentou

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Multiplicação microbiana no leite cru armazenado em tanques de expansão direta

Abstract: RESUMO O presente estudo objetivou avaliar o efeito do tempo de armazenagem do leite em tanques de expansão direta, modelo de duas e quatro ordenhas, sobre a contagem bacteriana total (CBT) e a contagem de bactérias psicrotróficas (CBP

Cited by 12 publications

References 10 publications

La influencia del método de ordeño, las condiciones de almacenamiento y el recuento de células somáticas en la calidad de la leche cruda en tanques

La influencia del método de ordeño, las condiciones de almacenamiento y el recuento de células somáticas en la calidad de la leche cruda en tanques

Staphylococcus aureus and Mesophilic Aerobic Bacteria Quantification in Hygienization Process of Milking Equipment

Qualidade do leite cru refrigerado e características da produção leiteira na mesorregião oeste paranaense, Brasil

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