Short communication: Evaluation of bulk tank milk microbiological quality of nine dairy farms in Tennessee

Gillespie, B. E.; Lewis, Marion; Boonyayatra, Sukolrat; Maxwell, Mikayla; Saxton, Arnold M.; Oliver, S. P.; Almeida, Ricardo Augusto Monteiro de Barros

doi:10.3168/jds.2011-4881

Cited by 34 publications

(31 citation statements)

References 8 publications

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“…Both Staphylococcus and Streptococcus were detected at the highest levels in milk overall, and the populations of both were significantly enriched in the summer season. This result is in agreement with culture-based studies that have similarly found high numbers of Streptococcus in either the summer or winter (45–47). …”

Section: Discussionsupporting

confidence: 92%

The Core and Seasonal Microbiota of Raw Bovine Milk in Tanker Trucks and the Impact of Transfer to a Milk Processing Facility

Kable

Srisengfa

Laird

et al. 2016

mBio

137

112

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Currently, the bacterial composition of raw milk in tanker trucks and the outcomes of transfer and storage of that milk at commercial processing facilities are not well understood. We set out to identify the bacteria in raw milk collected for large-scale dairy product manufacturing. Raw bovine milk samples from 899 tanker trucks arriving at two dairy processors in San Joaquin Valley of California during three seasons (spring, summer, and fall) were analyzed by community 16S rRNA gene sequencing. This analysis revealed highly diverse bacterial populations, which exhibited seasonal differences. Raw milk collected in the spring contained the most diverse bacterial communities, with the highest total cell numbers and highest proportions being those of Actinobacteria. Even with this complexity, a core microbiota was present, consisting of 29 taxonomic groups and high proportions of Streptococcus and Staphylococcus and unidentified members of Clostridiales. Milk samples were also collected from five large-volume silos and from 13 to 25 tankers whose contents were unloaded into each of them during 2 days in the summer. Transfer of the milk to storage silos resulted in two community types. One group of silos contained a high proportion of Streptococcus spp. and was similar in that respect to the tankers that filled them. The community found in the other group of silos was distinct and dominated by Acinetobacter. Overall, despite highly diverse tanker milk community structures, distinct milk bacterial communities were selected within the processing facility environment. This knowledge can inform the development of new sanitation procedures and process controls to ensure the consistent production of safe and high-quality dairy products on a global scale.

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Section: Discussionsupporting

confidence: 92%

The Core and Seasonal Microbiota of Raw Bovine Milk in Tanker Trucks and the Impact of Transfer to a Milk Processing Facility

Kable

Srisengfa

Laird

et al. 2016

mBio

137

112

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“…Increased SCC in the milk should not be underestimated as they are followed by the multi-dimensional negative effect related to animal heath and farmer profitability. Previous study has shown that season trends influence the somatic cells count in USA and Canada [20,21]. While in our work we haven't seen any difference between months.…”

Section: Discussioncontrasting

confidence: 65%

Impact of Bacterial and Somatic Cells Content on Quality Fresh Milk in Small-Scale Dairy Farms in Kosovo

Bytyqi¹,

Vehapi²,

Rexhepi³

et al. 2013

FNS

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The basic goal of this research was to determine the impact of the presence of bacterial (CFU) and somatic cells count content (SCC) in quality of fresh milk in some small cattle farms in Kosovo. The survey was based on existing standards for milk quality in Kosovo placed under administrative guidance MA-no. 20/2006. The study was based on fresh milk analysis of 150 farms performed during the period September-December 2012, which was obtained in 9 different localities (collection points) of the Kosovo. Our study reveals that CFU and SCC in fresh milk were significantly affected by a number of factors, as: sampling period (repetition), locality, breed, and time of sampling (evening or/and morning). According to the results for CFU and SCC, there were big differences between the farms (milk collection points) included in the study (P < 0.0403) and (P < 0.0293). The results show that small size breed like Busha and its crosses tend to be less exposed to SCC/mL in milk (72.840) and (293.592), compared to Black Holstein (613.462), Simmental (521.519) and Brown Swiss (418.44). Milk produced in evening tended to be of better quality (259.854 CFU/mL) compared to the one from morning milking (576.689 CFU/mL). Fresh milk quality analyzed in the third repetition was better for about 33.3% compared with the repletion first. For CFU and SCC, the analyses show that about 74.7% and 64.7% of milk produced belongs to extra quality, while lower quality of milk of category three is 12.0% and 23.3%, respectively. Considering that about 85% of milk produced in Kosovo comes from small-scale dairy farms, the current study sets out that small-scale milk production system cannot be neglected by interest parties in dairy sector and needs permanent following up and improvement.

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“…The existence of coliform shows nonsufficient sanitation and hygiene applications in milking, storage and carriage process (Chye et al , 2004; Pantoja et al , 2009). Unclean udders (Pantoja et al , 2009), soil, manure and soiled water are important causes for increasing coliform counts in the milk (Gillespie et al , 2012). …”

Section: Resultsmentioning

confidence: 99%

“…The count of coliform bacteria is an indicator of fecal contamination in the raw milk (Worku et al , 2012). Coliform bacteria can contaminate milk by dirty udders and tears (Cicconi-Hogan et al , 2013a; Pantoja et al , 2009), soiled water, feces of mouse and bird, insects, dust, unsanitary equipments (Gillespie et al , 2012) and mastitis (Cicconi-Hogan et al , 2013a; Worku et al , 2012). Staphylococcus aureus ( S. aureus ) is a pathogen for human and some animal species.…”

Section: Introductionmentioning

confidence: 99%

Prevalence and Comparing of Some Microbiological Properties, Somatic Cell Count and Antibiotic Residue of Organic and Conventional Raw Milk Produced in Turkey

Ürkek¹,

Şengül²,

Erkaya³

et al. 2017

Korean Journal for Food Science of Animal Resources

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The aim of this study was to investigate the effects of production systems and milk collection periods on the somatic cell count (SCC), some microbiological properties, total aerobic mesophilic bacteria (TAMB), coliform, Staphylococcus aureus (S. aureus), yeast and mould) and antibiotic residue of milk; in Turkey. Milk samples were collected from 9 conventional farms and 9 organic farms during one year time, at six different months (December 2013 to October 2014), and all farms were selected from the same geographical locations. All organically managed farms had organic production certificates given by the Republic of Turkey Ministry of Food, Agriculture and Livestock. The count of TAMB, coliform, and coagulase positive S. aureus were affected by production systems at the level of p<0.01; yeast and mold, and somatic cell count (SCC) were affected at the level of p<0.05. But, differences according to months were statistically significant only on TAMB (p<0.01) and coliform (p<0.05) counts. The general means of TAMB, coliform and yeast and mould counts of the organic milk (OM) were significantly lower (p<0.05), while the general means of SCC and coagulase positive S. aureus count of the OM was significantly higher (p<0.05) compared to conventional milk (CM). Antibiotic residue was determined in one of the CM sample and in two of the OM samples. Our study is the first research that compared conventional and organic milk in Turkey. This study indicated that the microbiological quality of OM was the higher in terms of TAMB, coliform and yeast and mould, whereas was the lower in relation to SCC and coagulase positive S. aureus counts. But, the quality of both milk types should be improved.

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Short communication: Evaluation of bulk tank milk microbiological quality of nine dairy farms in Tennessee

Cited by 34 publications

References 8 publications

The Core and Seasonal Microbiota of Raw Bovine Milk in Tanker Trucks and the Impact of Transfer to a Milk Processing Facility

The Core and Seasonal Microbiota of Raw Bovine Milk in Tanker Trucks and the Impact of Transfer to a Milk Processing Facility

Impact of Bacterial and Somatic Cells Content on Quality Fresh Milk in Small-Scale Dairy Farms in Kosovo

Prevalence and Comparing of Some Microbiological Properties, Somatic Cell Count and Antibiotic Residue of Organic and Conventional Raw Milk Produced in Turkey

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