Risk factors for bacteriological quality of bulk tank milk in Prince Edward Island dairy herds. Part 2: Bacteria count-specific risk factors

Elmoslemany, Ahmed; Keefe, Greg; Dohoo, Ian R.; Jayarao, Bhushan M.

doi:10.3168/jds.2008-1813

Cited by 57 publications

(63 citation statements)

References 17 publications

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“…Two plates for each sample were seeded, one undiluted and other diluted in 1% buffered peptone water (Merck, Darmstadt, Germany) in the ratio of 1:10, according to the methodology described by Elmoslemany et al (2009b). The samples inoculated in Petrifilm were incubated at 32 °C for 24 hours (± 2 hours).…”

Section: Microbiological Analysis Of Milkmentioning

confidence: 99%

Effect of somatic cell count on composition and hygiene indicators of bulk tank milk

Macedo

Gonçalves

Cortinhas

et al. 2018

Braz. J. Vet. Res. Anim. Sci.

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This study evaluated the effect of somatic cell count (SCC) on composition and hygienic quality of dairy herd bulk tank milk -specifically, the effect of SCC of bulk tank of dairy herds on composition (fat, protein, total solids, nonfat dry solids) and on total bacterial count (TBC), psychrotrophic count (PC) and coliform count (CC) were evaluated. A total of 230 dairy herds located south of Minas Gerais and west of São Paulo were selected based on SCC geometric mean obtained from five monthly analyses preceding the start of the sampling. The dairy farms were classified according to SCC in three groups: low (< 250,000 cells/mL, n = 84), medium (> 250,000 and < 750,000 cells/mL, n = 79) and high SCC (> 750,000 cells/mL, n = 67). After herd selection, bulk tank milk samples were collected every 14 days for three months totaling 1380 samples, which were subjected to analysis of composition, TBC, PC, and CC. A decrease of TBC and CC was observed in herds with low SCC; however, herds with medium and high SCC had an increase in fat, crude protein, and total solids contents. A medium correlation was observed between TBC and PC (r = 0.6215), and also between PC and CC (r = 0.3692). Based on hygiene indicators and milk composition, a low and negative correlation between TBC and fat (r = -0.0585), PC and fat (r = -0.0585), and PC and total solids (r = -0.0662) was observed. Dairy herds with SCC < 250,000 cells/mL had higher bulk tank milk hygienic quality; however, considering the composition, herds with higher SCC produced higher milk fat and protein concentration. Keywords: Microbiological culture. Diagnostic. Microorganisms. Milk quality. Sanity. ResumoEste trabalho avaliou o efeito da contagem de células somáticas (CCS) na composição e na qualidade higiênica do leite de tanque de rebanhos leiteiros. Especificamente, foram avaliados o efeito da CCS do tanque de rebanhos leiteiros na composição (gordura, proteína, sólidos totais, extrato seco desengordurado) e nas contagens bacteriana total (CBT), de psicrotróficos (CP) e de coliformes (CC). Um total de 230 rebanhos leiteiros localizados no sul de Minas Gerais e oeste de São Paulo foram selecionados com base na média geométrica da CCS obtida de cinco análises mensais anteriores ao início das coletas das amostras. As fazendas foram classificadas de acordo com a CCS em três grupos: baixa (< 250.000 células/mL, n = 84), média (> 250.000 e < 750.000 células/mL, n = 79) e alta CCS (> 750.000 células/mL, n = 67). Após a seleção dos rebanhos, amostras de leite do tanque foram coletadas a cada catorze dias durante três meses, totalizando 1.380 amostras, as quais foram submetidas às análises de composição, CBT, CP e CC. Uma redução da CBT e da CC foi observada em rebanho com baixa CCS; entretanto, rebanhos com média e alta CCS tiveram aumento nos teores de gordura, proteína bruta e sólidos totais. Uma média correlação foi observada entre CBT e CP (r = 0,6215) e também entre CP e CC (r = 0,3692). Com base nos indicadores de higiene e na composição do leite, foi observada ...

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Section: Microbiological Analysis Of Milkmentioning

confidence: 99%

Effect of somatic cell count on composition and hygiene indicators of bulk tank milk

Macedo

Gonçalves

Cortinhas

et al. 2018

Braz. J. Vet. Res. Anim. Sci.

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“…The bacterial levels observed in milk may be influenced by teat preparation practices, sanitation of the milking equipment and the milk storage efficiency (Hayes et al, 2001;Chambers, 2002;Ruegg and Reinemann, 2002;Elmoslemany et al, 2009). Likewise, the presence of thermoduric bacteria in milk is used as an indicator of parlour and equipment hygiene (Jayarao and Wolfgang, 2003).…”

Section: Introductionmentioning

confidence: 99%

Effect of omitting teat preparation on bacterial levels in bulk tank milk

Gleeson¹,

Edwards²,

O’Brien³

2016

Irish Journal of Agricultural and Food Research

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The objective of this study was to investigate the effect of omitting teat preparation prior to milking on the bacterial levels in milk directly after milking and after a period of milk storage. Eighty Holstein-Friesian dairy cows were assigned to two pre-milking teat preparation treatments: (i) washing of teats and drawing of foremilk, followed by drying with paper towels and (ii) no teat preparation. Individual cow measurements included individual quarter somatic cell count (SCC) and teat swabs for the presence of Bacillus cereus sensu lato. On seven monthly occasions, all milk produced over a 24 h period from each treatment group was segregated into a separate tank and sampled. Sub-samples of this milk were stored at 4 °C for 0, 24, 48 and 72 h, and the milk was analysed for total bacterial count (TBC), thermoduric bacterial count and the presence of B. cereus s. l. Individual quarter SCCs were numerically higher for unprepared teats (159,000 cells/mL) compared with those for prepared teats (133,000 cells/mL; P < 0.09). A similar trend was observed for bulk tank SCC, with the unprepared teat treatment tending to have a higher SCC (155,857 cells/mL) compared to the prepared teat treatment (102,286 cells/mL; P < 0.09). The TBC was not significantly higher from unprepared teats (3,152 cfu/ mL) compared with milk from prepared teats (1,678 cfu/mL) (P < 0.10). Milk TBC was significantly higher after storage for 72 h compared with that after 0, 24 and 48 h (P < 0.01). The results of this study indicate that under good hygienic conditions in an outdoor grazing situation, the omission of pre-milking teat preparation has a minimal effect on TBC and SCC.

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“…Diseases such as foot-rot which cause significant pain in ruminants, should be targeted for eradication, as has been done in some countries (e.g., Norway [127] and Australia [128]); this is a very effective way of preventing pain and suffering. Incidence of mastitis can be prevented through good housing and hygiene management in the milking parlor as well as in bedded areas [129][130][131]. Disease prevention also comes from early treatment of the disease so as to prevent the spread of infection, reducing the number of animals affected, but also reducing the amount of time animals with the disease will experience pain.…”

Section: Preventing Pain From Occurringmentioning

confidence: 99%

Why Pain Is Still a Welfare Issue for Farm Animals, and How Facial Expression Could Be the Answer

McLennan

2018

Agriculture

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Pain is a sensory and emotional experience that significantly affects animal welfare and has negative impacts on the economics of farming. Pain is often associated with common production diseases such as lameness and mastitis, as well as introduced to the animal through routine husbandry practices such as castration and tail docking. Farm animals are prey species which tend not to overtly express pain or weakness, making recognizing and evaluating pain incredibly difficult. Current methods of pain assessment do not provide information on what the animal is experiencing at that moment in time, only that its experience is having a long term negative impact on its behavior and biological functioning. Measures that provide reliable information about the animals' affective state in that moment are urgently required; facial expression as a pain assessment tool has this ability. Automation of the detection and analysis of facial expression is currently in development, providing further incentive to use these methods in animal welfare assessment.

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Risk factors for bacteriological quality of bulk tank milk in Prince Edward Island dairy herds. Part 2: Bacteria count-specific risk factors

Cited by 57 publications

References 17 publications

Effect of somatic cell count on composition and hygiene indicators of bulk tank milk

Effect of somatic cell count on composition and hygiene indicators of bulk tank milk

Effect of omitting teat preparation on bacterial levels in bulk tank milk

Why Pain Is Still a Welfare Issue for Farm Animals, and How Facial Expression Could Be the Answer

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