Identification of a bovine mastitis Escherichia coli subset

Blum, Shlomo E.; Heller, E. D.; Krifucks, O.; Sela, Shlomo; Hammer-Muntz, Orly; Leitner, Gabriel

doi:10.1016/j.vetmic.2008.05.012

Cited by 73 publications

(84 citation statements)

References 26 publications

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“…This conversion causes the release of β-casein 1-28, which has the ability to block potassium channels, thereby, reducing the release of lactose into the lumen of the mammary alveoli (LEITNER et al, 2004;MOUSSAOUI et al, 2004;SILANIKOVE et al, 2009SILANIKOVE et al, , 2013. Among the possible causes of this influence of mastitis on lactose content could be the utilization of lactose by pathogens, it being an important nutritional substrate (BLUM et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Multivariate analysis of lactose content in milk of Holstein and Jersey cows1

Alessio

Neto

Velho

et al. 2016

SCA

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This study evaluated the factors influencing the variation in the lactose content of milk in Holstein and Jersey herds in Santa Catarina, southern Brazil, using multivariate analysis. Data from 73 dairy herds in the Dairy Herds Improvement Program of the State of Santa Catarina were provided by the Santa Catarina Association of Cattle Breeders (ACCB). A total of 46,242 monthly records of Holstein and Jersey (59 and 41 % of the total records, respectively) cows from 2009 to 2012 were analyzed using multiple correspondence, factor, and cluster analyses. Lactose content was observed to correlate with somatic cell count and parity, whereas the evaluated breeds, as well as the production and concentrations of fat and protein in the milk, were not associated with the lactose content. The cows were categorized into three groups, the first consisting of cows of both breeds with low lactose content (4.19), high somatic cell score (5.82), and higher parity (2.50), contrasting with two other groups each with mean values characteristic for Holstein and Jersey breeds, respectively. Analysis of cows without subclinical mastitis (<200,000 somatic cells ml -1 ) revealed that the relationship of parity with lactose level was independent of the effect of somatic cells. Lactose contents less than 4.4 % were observed in autumn. Overall, the present study suggests that the lactose content of milk is influenced by somatic cell count and parity and that it varies seasonally; however, it is not related to breed, milk yield, milk fat content, or milk protein level.

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Section: Discussionmentioning

confidence: 99%

Multivariate analysis of lactose content in milk of Holstein and Jersey cows1

Alessio

Neto

Velho

et al. 2016

SCA

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“…With this in mind, it has been suggested that clinical bovine E. coli mastitis isolates differ from cowshed environmental E. coli isolates and may form a subset of environmental E. coli population . Mastitis isolates showed faster growth in the udder medium and can evade the host cellular innate immune response (Blum et al, 2008).…”

Section: Mastitis Caused By Escherichia Colimentioning

confidence: 99%

The Innate Immunity in Bovine Mastitis: The Role of Pattern-Recognition Receptors

Souza¹

2012

American Journal of Immunology

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Mastitis is the most costly disease for dairy farmers and industry, which are mainly caused by the entry of bacteria to the teat canal. Shortly after the entry of the invading bacteria, the innate immunity recognizes the invading pathogen through pattern recognition receptors and initiates the inflammatory response necessary to eliminate the invading bacteria. This initial inflammatory response releases cytokines and chemoattractants for the rapid and massive influx of neutrophils from the blood to the site of infection which form the first line of cellular defense against bacteria This article reviewed the role of the most recent knowledge regarding the innate immunity in bovine mastitis focusing in the two major mastitis pathogens: Escherichia coli and Staphylococcus aureus the S. aureus appears to mostly circumvent the host immune response, as the Toll-Like Receptors (TLRs) signaling pathways. The Intramammary Infections (IMIs) by this bacteria result in a very moderate host response with minimal observable innate immune response, which are related to well-known ability to this pathogen to establish chronic IMI. Otherwise, E. coli elicits a strong and earlier response, mainly through TLR4, that is associated with the severity of the mastitis and the clinical manifestation commonly observed in dairy cows infected with this pathogen. Suboptimal and dysfunctional mammary defenses may contribute to the development of severe acute inflammation or chronic mastitis that adversely affects the milk production and quality. Thus, a better understanding of mastitis pathogen interaction to the host may be useful for future control of mastitis.

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“…Generally, coliforms may be associated with cases of foodborne intoxication, but this group is easily destroyed by pasteurization (PANTOJA et al, 2011). Nevertheless, if there is some failure during heat treatment, these microorganisms can deteriorate the milk (GAUCHER et al, 2008) and cause disease in consumers (BLUM et al, 2008). High CC in bulk tank milk is indicative of fecal contamination, failure in milk refrigeration or in sanitization of milking machine and tank (COTON et al, 2012).…”

Section: Introductionmentioning

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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Identification of a bovine mastitis Escherichia coli subset

Cited by 73 publications

References 26 publications

Multivariate analysis of lactose content in milk of Holstein and Jersey cows1

Multivariate analysis of lactose content in milk of Holstein and Jersey cows1

The Innate Immunity in Bovine Mastitis: The Role of Pattern-Recognition Receptors

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

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