Considerações sobre o tratamento das mastites

Langoni, Hélio; Salina, A.; Oliveira, G. C.; Junqueira, N. B.; Menozzi, Benedito Donizete; Joaquim, Sâmea Fernandes

doi:10.1590/s0100-736x2017001100011

Cited by 43 publications

(46 citation statements)

References 49 publications

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“…Bovine mastitis is considered the main disease in dairy cattle farming worldwide , Ruegg 2012, Costa et al 2013. It is an infectious process usually caused by the presence of pathogenic microorganisms in the mammary gland, affecting the production and composition of quarter milk, with reflexes mainly in somatic cell counts (SCC), total bacterial counts (TBC), and contents of casein and fat (Freitas et al 2005, Santos & Fonseca 2007, Langoni et al 2017. Bovine mastitis can also cause economic losses owing to expenses with veterinary medicines and services and, in some cases, to death or early discard of affected animals (Oviedo-Boyso et al 2007, Lopes et al 2011, 2012.…”

Section: Introductionmentioning

confidence: 99%

Staphylococcus aureus and Streptococcus agalactiae: prevalence, resistance to antimicrobials, and their relationship with the milk quality of dairy cattle herds in Minas Gerais state, Brazil

et al. 2019

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Bovine mastitis is the most frequent disease worldwide in dairy herds, causing high economic losses to producers and industry, as well as having implications for public health due to the zoonotic potential of some agents involved in its etiology and the increased risk of antimicrobial residues in milk and its derivatives. Considering the multifactorial aspect of this disease, knowledge of the agents involved in its etiology and their antimicrobial susceptibility profiles is very important. This study was conducted with 306 dairy herds from the Campo das Vertentes region, located in the south of Minas Gerais state, whose owners were milk suppliers to a dairy in the same region. The study involved approximately 34,000 dairy cows and covered an area of approximately 12,564 km2. In these herds, prevalence rates of Staphylococcus aureus and Streptococcus agalactiae and their relationship with bulk milk somatic cell counts (BMSCC), total bacterial counts (TBC), and daily production were evaluated. In addition, analyses of resistance of these pathogens to the antimicrobials most commonly used in the treatment of mastitis in dairy herds were performed. Microbiological analyses of milk samples from collect from bulk milk tanks were performed aiming to evaluate the prevalence of S. aureus and S. agalactiae. For these proposes, the modified Baird-Parker Agar medium was used for detection of S. aureus and the modified Edwards Agar medium, enriched with 5% defibrinated sheep blood, was used for detection of S. agalactiae. The disc diffusion technique was applied to evaluate antimicrobial resistance. Results show high prevalence rates of S. aureus (70.3%) and S. agalactiae (67.0%) in the dairy farms studied, with 47.71% of the herds showing both pathogens. Associations between BMSCC and the presence of pathogens S. aureus and S. agalactiae and between TBC and the presence of S. agalactiae were observed, demonstrating the influence of these pathogens in milk quality. No variation was observed in the distribution of S. aureus and S. agalactiae in the different strata of daily production. High levels of resistance and multi-resistance were observed among the pathogens S. aureus and S. agalactiae. The results indicate the need for more effective control measures for mastitis caused by S. aureus and S. agalactiae in the dairy herds of the region studied and more judicious use of antimicrobials in order to reduce the problem of resistance to them.

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Section: Introductionmentioning

confidence: 99%

Staphylococcus aureus and Streptococcus agalactiae: prevalence, resistance to antimicrobials, and their relationship with the milk quality of dairy cattle herds in Minas Gerais state, Brazil

et al. 2019

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“…Of these, 18 were positive for Escherichia coli (37.5%) and 20 were positive for Staphylococcus aureus (41.65%). The others positive samples (20.85%) did not present bacterial growth and were characterized as false positives, probably due to the low accuracy of the CMT method or to elimination by the animal's own defenses, such as phagocytosis, which could produce a negative result (Langoni et al, 2017).…”

Section: California Mastitis Test (Cmt) and Microorganisms Associatedmentioning

confidence: 99%

Microbiological Evaluation of Milk Quality and Antibiogram in Dairy Cows Managed on Pasture

Ítavo¹,

Ítavo²,

Dias³

et al. 2020

JAS

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Mastitis is a disease in dairy cattle that damage the milk chain. It was aimed identify the major causative agents of bovine mastitis in small dairy farms by producing an antibiogram and analysis of milk quality. Methods: During the summer, 280 dairy cows were examined on a farm located in Camapuã, MS, Brazil. The farm had a concrete milking facility and used cleaning and disinfection of the udder before and after milking to control mastitis. For assess microbial resistance, two samples of milk per cow were collected biweekly between January and March. The antibiotics sulfazotrim (25 μg), penicillin (10 μg), streptomycin (10 μg), vancomycin (30 μg), chloramphenicol (30 μg), tetracycline (30 μg), amoxicillin (10 μg), and gentamycin (10 μg) were used. Results: A total of 17.14% of the animals were positive for the California Mastitis Test (CMT). The identification of the pathogens revealed that Staphylococcus aureus accounted for 41.65% of the isolated organisms and Escherichia coli for 37.5%. Our results showed only sulfazotrim and chloramphenicol had effective results for both Gram-negative and Gram-positive bacteria. The isolated strains presented high resistance to the other tested antibiotics. Conclusions: sulfazotrim (25 μg) and chloramphenicol (30 μg) can be used to disinfect the udder of dairy cows.

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“…However, its productive efficiency has mastitis incidence in dairy cattle as main hindrance, causing economic damages and decreasing the quality of the final product. Mastitis is a multi-etiological disease characterized by an inflammatory process of the mammary glands, as a result of a bacterial infection that presents itself in subclinical and clinical forms (Langoni et al, 2017;Vliegher, Fox, Piepers, McDougall, & Barkema, 2012).…”

Section: Introductionmentioning

confidence: 99%

Exploratory data inference for detecting mastitis in dairy cattle

Silva

Pandorfi

Almeida

et al. 2020

Acta Sci. Anim. Sci.

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The aim of this study was to employ the principal component technique to physiological data and environmental thermohygrometric variables correlated with detection of clinical and subclinical mastitis in dairy cattle. A total of 24 lactating Girolando cows with different clinical conditions were selected (healthy, and with clinical or subclinical mastitis). The following physiological variables were recorded: udder surface temperature, ST (°C); eyeball temperature, ET (°C); rectum temperature, RT (°C); respiratory frequency, RF (mov. min-1). Thermohygrometric variables included air temperature, AirT (°C), and relative humidity, RU (%). ST was determined by means of thermal images, with four images per animal, on these quarters: front left side (FL), front right side (FR), rear right side (RR) and rear left side (RL), totaling 96 images. Exploratory data analysis was run through multivariate statistical technique with the employment of principal components, comprehending nine variables: ST on the FL, FR, RL and RR quarters; ET, RT; RF, AirT and RU. The representative quarters of the animals with clinical and subclinical mastitis showed udder temperatures 8.55 and 2.46° C higher than those of healthy animals, respectively. The ETs of the animals with subclinical and clinical mastitis were, respectively, 7.9 and 8.0% higher than those of healthy animals. Rectum temperatures were 2.9% (subclinical mastitis) and 5.5% (clinical mastitis) higher compared to those of healthy animals. Respiratory frequencies were 40.3% (subclinical mastitis) and 61.6% (clinical mastitis) higher compared to those of healthy animals. The first component explained 91% of the total variance for the variables analyzed. The principal component technique allowed verifying the variables correlated with the animals' clinical condition and the degree of dependence between the study variables.

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Considerações sobre o tratamento das mastites

Cited by 43 publications

References 49 publications

Staphylococcus aureus and Streptococcus agalactiae: prevalence, resistance to antimicrobials, and their relationship with the milk quality of dairy cattle herds in Minas Gerais state, Brazil

Staphylococcus aureus and Streptococcus agalactiae: prevalence, resistance to antimicrobials, and their relationship with the milk quality of dairy cattle herds in Minas Gerais state, Brazil

Microbiological Evaluation of Milk Quality and Antibiogram in Dairy Cows Managed on Pasture

Exploratory data inference for detecting mastitis in dairy cattle

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