scholarly journals Prévalence des principales bactéries responsables de mammites subcliniques des vaches laitières au nord-est de l’Algérie

2012 ◽  
Vol 65 (1-2) ◽  
pp. 5 ◽  
Author(s):  
Z. Boufaida Asnoune ◽  
M. J. Butel ◽  
R. Ouzrout
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Streptococcus Agalactiae ◽  
Streptococcus Dysgalactiae ◽  
California Mastitis Test ◽  
Streptococcus Uberis

Des analyses bactériologiques de 235 prélèvements de lait de vaches laitières atteintes de mammites subcliniques dépistées par le California mastitis test, provenant de dix exploitations du nord-est de l’Algérie, ont été réalisées  sur une période de deux ans (2008-10). L’isolement bactérien a concerné 89 p. 100 des échantillons. Parmi les germes isolés, les coques à Gram positif ont été les plus fréquents, notamment des staphylocoques à coagulase négative (43 p. 100) et Staphylococcus aureus (30 p. 100). Escherichia coli a été isolé dans 14 p. 100 des prélèvements. Les autres germes isolés ont été Streptococcus uberis (4 p. 100), Streptococcus agalactiae (3 p. 100), Streptococcus dysgalactiae (3 p. 100), et Klebsiella sp. plus rarement (2 p. 100).

scholarly journals Celularidade do leite e Unidades Formadoras de Colônias nas mastites causadas por Staphylococcus coagulase positiva e coagulase negativa

2015 ◽  
Vol 35 (6) ◽  
pp. 518-524 ◽  
Author(s):  
Helio Langoni ◽  
Felipe Freitas Guimarães ◽  
Elizabeth Oliveira da Costa ◽  
Samea Fernandes Joaquim ◽  
Benedito Donizete Menozzi
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Klebsiella Pneumoniae ◽  
Streptococcus Agalactiae ◽  
Klebsiella Oxytoca ◽  
Sao Paulo ◽  
São Paulo ◽  
Streptococcus Dysgalactiae ◽  
Streptococcus Uberis

Resumo: A mastite é a principal afecção do gado destinado à produção leiteira, que impacta significativamente a cadeia produtiva do leite, com reflexos ainda para a saúde pública. Estudou-se aspectos relacionados à etiologia, celularidade e de contagem bacteriana em 10 propriedades leiteiras, localizadas no Estado de São Paulo. Foram examinadas 1148 vacas em lactação, totalizando 4584 glândulas mamárias. Foram considerados os casos, em que houve isolamento de estafilococos coagulase positiva (SCP) e estafilococos coagulase negativa (SCN). Os resultados revelaram microbiota com vários patógenos e diferentes espécies de SCN (128 casos) e SCP (45), Staphylococcus aureus(90), Streptococcus agalactiae(70), Streptococcus dysgalactiae (69), Streptococcus uberis(29), Corynebacteriumspp. (230), Klebsiella pneumoniae(28), Klebsiella oxytoca(2), Escherichia coli(15), Enterobactersp. (3). Os resultados de contagem de células somáticas (CCS) relacionados aos SCP e SCN não mostraram diferenças entre as propriedades avaliadas, entretanto com diferenças significantes ao se avaliar a CCS entre os dois grupos de estafilococos, como pode ser evidenciado ao comparar SCN Discreto e SCP exuberante (P<0,01), SCP Discreto e SCP exuberante (P<0,001) e SCN moderado e SCP exuberante (P<0,01). A avaliação da CCS relacionada à intensidade da infecção, considerando-se como crescimento discreto o isolamento de até nove colônias, moderado de dez a 29 colônias e exuberante, com 30 ou mais colônias, revelou para ambos os grupos de estafilococos que quanto maior o número de unidades formadoras de colônias (UFC), a CCS é mais elevada, sendo sempre maior nos casos de SCP. Conclui-se que quando há maior número de UFC, há concomitantemente maior CCS/mL de leite, no caso dos SCP e SCN, o que mostra relação direta da intensidade do processo infeccioso com a resposta da celularidade do leite, bem como pela relevância desses na etiologia das mastites e dos aspectos negativos tanto para a produção, quanto na qualidade do leite produzido nas propriedades.

scholarly journals Possibility of application of dodicin hydrochloride in prevention of mastitis in cows

2006 ◽  
Vol 60 (3-4) ◽  
pp. 207-221
Author(s):  
Svetlana Joksovic ◽  
Vitomir Cupic ◽  
Vera Katic
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Streptococcus Agalactiae ◽  
Control Group ◽  
Main Approach ◽  
Laboratory Conditions ◽  
Streptococcus Uberis ◽  
Holstein Friesian ◽  
Experimental Group ◽  
Outer Environment

The main approach to curbing mastitis is to prevent the entry of microorganisms from the outer environment into the mammary gland, which is achieved by the use of papilla disinfection following every time of milking. The objective of this work was to examine the antimicrobial activity of the disinfectant dodicin hydrochloride, in fact the preparation that contains this disinfectant (DESU? M), against bacteria, the most frequent causes of mastitis in cows. The efficacy of modified DESU? Mwas examined under laboratory conditions using the quantitative test against the following microorganisms: Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae and Streptococcus uberis, under the conditions in the field. The udders of an experimental group of 20 cows of the Holstein-Friesian breed were immersed in a solution of the modified preparation DESU ? M following every time of milking over a period of three months. In the second group of 10 cows of the Holstein-Friesian breed, marked as the control group, no disinfection was applied following the milkings. The preparation DESU? Mexhibited satisfactory antimicrobial efficacy against the most frequent causes (Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae and Streptococcus uberis) of mastitis in cows under laboratory conditions. With the application of the preparation DESU? M, following every time of milking over a period of three months, the number of somatic cells was reduced by almost one half in comparison with their number at the start of the experiment. No residue of the modified preparation DESU ? M were found in any sample of milk from the experimental group of cows.

Influence of Addition of Newly Drawn Milk and Fluctuating Temperatures of Farm Bulk Tanks on Growth of Mastitis-Causing Bacteria

1986 ◽  
Vol 49 (1) ◽  
pp. 54-57 ◽  
Author(s):  
HALIT H. OZ ◽  
R. J. FARNSWORTH
Keyword(s):  
Staphylococcus Aureus ◽  
Growth Rate ◽  
Streptococcus Agalactiae ◽  
Staphylococcus Epidermidis ◽  
Streptococcus Dysgalactiae ◽  
Enhancing Effect ◽  
Fresh Milk ◽  
Streptococcus Uberis ◽  
Bulk Tank ◽  
Fluctuating Temperatures

Effect of addition of newly drawn fresh milk of consecutive milkings on growth of Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus agalactiae, Streptococcus dysgalactiae, and Streptococcus uberis in milk held at fluctuating temperatures of a farm bulk tank for 48 h was studied. There was a statistically insignificant effect of the addition of newly drawn fresh milk of consecutive milkings on the growth rate of S. aureus, S. epidermidis, S. agalactiae and S. uberis but there was a significant (p&lt;0.001) growth enhancing effect on S. dysgalactiae. However, all the bacteria grew significantly (p&lt; 0.001) in milk held at fluctuating temperatures of farm bulk tank for 48 h.

Bacteriocin ST91KM, produced by Streptococcus gallolyticus subsp. macedonicus ST91KM, is a narrow-spectrum peptide active against bacteria associated with mastitis in dairy cattle

2008 ◽  
Vol 54 (7) ◽  
pp. 525-531 ◽  
Author(s):  
Reneé Pieterse ◽  
Svetoslav D. Todorov ◽  
Leon M.T. Dicks
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Streptococcus Agalactiae ◽  
Staphylococcus Epidermidis ◽  
Mode Of Action ◽  
Proteolytic Enzymes ◽  
Streptococcus Dysgalactiae ◽  
Streptococcus Gallolyticus ◽  
Streptococcus Uberis ◽  
Sds Page

Streptococcus gallolyticus subsp. macedonicus ST91KM produces a bacteriocin (macedocin ST91KM) active against Streptococcus agalactiae , Streptococcus dysgalactiae subsp. dysgalactiae , Streptococcus uberis , Staphylococcus aureus , and Staphylococcus epidermidis . Macedocin ST91KM is, according to tricine-SDS PAGE, between 2.0 and 2.5 kDa in size. Antimicrobial activity remained unchanged after 2 h of incubation at pH 2.0–10.0 and after 100 min at 100 °C. The peptide was inactivated after 20 min at 121 °C and when treated with proteolytic enzymes. Treatment with α-amylase had no effect on activity, suggesting that the mode of action does not depend on glycosylation. Amplification of the genome of strain ST91KM with primers designed from the macedocin precursor gene (mcdA) produced 2 fragments (approximately 375 and 220 bp) instead of one 150-bp fragment, as recorded for macedocin produced by Streptococcus gallolyticus subsp. macedonicus ACA-DC 198. Strain ACA-DC 198 was not available. However, DNA amplified from strain LMG 18488 (ACA-DC 206), genetically closely related to strain ACA-DC 198, revealed 99% homology to the mcdA of strain ACA-DC 198 (accession No. DQ835394). Macedocin ST91KM may thus be a second putative bacteriocin described for Streptococcus gallolyticus subsp. macedonicus.

The sensitivity of bovine staphylococci, streptococci and corynebacteria to cloxacillin and various other antibiotics

1967 ◽  
Vol 34 (3) ◽  
pp. 249-255 ◽  
Author(s):  
A. Jones ◽  
T. M. Higgs ◽  
F. K. Neave ◽  
A. Smith
Keyword(s):  
Staphylococcus Aureus ◽  
Streptococcus Agalactiae ◽  
Penicillin G ◽  
Clear Relationship ◽  
Streptococcus Dysgalactiae ◽  
Similar Activity ◽  
Staph Aureus ◽  
Corynebacterium Ulcerans ◽  
Streptococcus Uberis

SummaryThe sensitivities of isolates of bovine staphylococci, corynebacteria and streptococci to various antibiotics were determined. The growth of various strains of Staphylococcus aureus was inhibited by the following range of concentrations of antibiotic: cloxacillin, 0·07 to 0·6 μg/ml; penicillin G, 0·018 to > 250 μg/ml; streptomycin, 1·25 to > 250 µg/ml; novobiocin, 0·15 to 25 μg/ml; chlortetracycline, 0·6 to 10 µg/ml. The concentrations of cloxacillin required to inhibit growth were between 0·15 and 1·25 μg/ml for strains of Streptococcus agalactiae; 0·07 to 0·3 μg/ml for strains of Streptococcus dysgalactiae and 0·15 to 0·6 μg/ml for strains of Streptococcus uberis.The corynebacteria were generally sensitive to the penicillins (ampicillin, penicillin G, phenethicillin and cloxacillin), but showed least sensitivity to cloxacillin which had a similar activity to that of chlortetracycline, neomycin and oleandomycin. Chloramphenicol and streptomycin were less active than the penicillins and novobiocin showed little activity against Corynebacterium ulcerans.A clear relationship was confirmed between the sensitivity of staphylococci to cloxacillin and penicillin G. Some indication was found of an association between the sensitivity of staphylococci to cloxacillin and the success of cloxacillin intramammary therapy in the non-lactating udder. There was no evidence of a change in the sensitivity of Staph. aureus following exposure to cloxacillin in the non-lactating udder.

scholarly journals Investigations of efficacy of intramammary applied antimicrobials and glucocorticosteroides in the treatment of subclinical and clinical mastitis in cows

2013 ◽  
Vol 67 (1-2) ◽  
pp. 15-27
Author(s):  
Slobodanka Vakanjac ◽  
Vojislav Pavlovic ◽  
Vladimir Magas ◽  
Milos Pavlovic ◽  
Miloje Djuric ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Streptococcus Agalactiae ◽  
Subclinical Mastitis ◽  
Clinical Mastitis ◽  
Penicillin G ◽  
Economic Losses ◽  
Prednisolone Acetate ◽  
Streptococcus Dysgalactiae ◽  
Procaine Penicillin ◽  
Streptococcus Uberis

Inflammation of the mammary gland, mastitis in cows, presents one of the most acute problems in intensive dairy production, inflicting huge economic losses. In the course of one year, 80 samples were taken at investigated farms from udder quarters of cows with clinical mastitis and 160 samples from udder quarters of cows with subclinical mastitis. The efficacy of three preparations, A, B, and C, was examined in the treatment of clinical and subclinical mastitis in cows. The investigations indicate that antibiotic preparation A (neomycin, polimixine B, oleandomycin and prednisolone) exhibited a greater efficacy in the treatment of clinical mastitis caused by Streptococcus agalactiae, Streptococcus dysgalactiae, Streptococcus uberis and Micrococcus sp., but a smaller efficacy in the treatment of subclinical mastitis caused by Staphylococcus aureus. Preparation B (amoxicillin, clavulanic acid and prednisolone) exhibited a higher efficacy in the treatment of clinical mastitis caused by Streptococcus agalactiae, Streptococcus dysgalactiae, Streptococcus uberis and Micrococcus, but a weaker effect in the treatment of subclinical mastitis caused by Staphylococcus aureus. Preparation C (procaine penicillin G, streptomycin, neomycin sulfate and prednisolone acetate) exihibited efficacy in the treatment of clinical and subclinical mastitis caused by Streptococcus agalactiae, Streptococcus dysgalactiae, Streptococcus uberis, Micrococcus, Staphylococcus aureus and Esherichie coli.

scholarly journals Impact of Subclinical Mastitis-causing Bacterial Species on the Composition and Chemical Properties of Milk

2021 ◽  
Author(s):  
Tarik Safak ◽  
Ali Risvanli ◽  
Zulal Ascı-Toraman
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Streptococcus Agalactiae ◽  
Bacterial Species ◽  
Chemical Properties ◽  
Subclinical Mastitis ◽  
Milk Composition ◽  
Mineral Matter ◽  
California Mastitis Test ◽  
And Staphylococcus Aureus

Background: Here we investigate whether the composition and some chemical properties of milk can correlate with bacterial species causing subclinical mastitis in cows. Methods: One hundred and eighty cows were used in the study. The California Mastitis Test (CMT) was applied to the selected cows. The cows were divided into four groups: cows with negative CMT (n = 45), the Escherichia coli (n = 45), Streptococcus agalactiae (n = 45) and Staphylococcus aureus (n = 45) groups. Result: Milk composition and some chemical properties were measured. The highest fat ratio (5.82±0.34%) was found in the Escherichia coli group (p less than 0.05). The proportions of solid-non-fat (9.67±0.09%), protein (3.51±0.03%), lactose (5.29±05%) and mineral matter (0.75±0.01%) were lowest in the Escherichia coli group (p less than 0.05). The electrical conductivity of milk was lowest in the CMT-negative group (4.23±0.02 mS/cm), while the Streptococcus agalactiae group had the highest value (4.61±0.02 mS/cm) (p less than 0.05). The specific gravity of the Escherichia coli group was lower than the CMT-negative (1,034.91±0.56 kg/m3) and Staphylococcus aureus (1,034.24±0.65 kg/m3) groups (p less than 0.05). Based on our findings, we propose that milk composition and some chemical parameters are altered in subclinical mastitis. However, these could not be standardized according to the responsible bacterial species. We recommend that these parameters are monitored regularly on dairy farms.

scholarly journals Antimicrobialsusceptibilityof bacteria isolated from goats with subclinical mastitis in the Southern Marmara region of Turkey

2021 ◽  
Vol 77 (05) ◽  
pp. 6527-2021
Author(s):  
Gulsen Goncagul
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Streptococcus Agalactiae ◽  
Staphylococcus Epidermidis ◽  
Subclinical Mastitis ◽  
Diffusion Method ◽  
Marmara Region ◽  
Dairy Goats ◽  
Isolation Rate ◽  
Streptococcus Uberis

The mastitis of dairy goats is a disease of the economic importance worldwide and is mostly associated with bacterial infections. The aim of this study was to isolate the bacteriae causing subclinical mastitis, and determine to the susceptibility of some clinical isolates against several antimicrobial agents frequently used to control bacterial subclinical mastitis in dairy goats in the Southern Marmara Region. A total of 68 Saanen goats were used for this investigation and subclinical mastitis was determined by using California Mastitis Test. As a result of bacteriological analysis of milk samples, 30 different bacteria species have been identified and non-aureus staphylococci found to be the predominant bacteria species with the rate of 22.1%. The species with the highest isolation rate among the isolates were Escherichia coli (18.9%), Staphylococcus aureus (15.7%), Streptococcus agalactiae (14.2%) and Staphylococcus epidermidis (7.9%). The antimicrobial susceptibility of the high isolation rate species including Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae, Staphylococcus epidermidis, Streptococcus uberis, Enterococcus faecalis, Staphylococcus haemolyticus and Mannheimia haemolytica to twelve antibiotics were determined by disc diffusion method. Bacterial strains analyzed showed highest sensitivity to ofloxacin (87.9%) and followed by cefuroxime (85.8%) and cefazolin (83.6%). In conclusion, subclinical mastitis still remains a problem in dairy goats, and for the elimination of subclinical mastitis, besides protective measures, determination of the bacteriae causing mastitis and their antibiotic sensitivities should be priority.

scholarly journals Проблеми захворювань молочної залози та перспективи розробки нових протимаститних препаратів

2017 ◽  
Vol 19 (82) ◽  
pp. 93-96
Author(s):  
I.M. Kushnir ◽  
S.D. Murska
Keyword(s):  
Staphylococcus Aureus ◽  
Streptococcus Agalactiae ◽  
Staphylococcus Epidermidis ◽  
Subclinical Mastitis ◽  
Postnatal Period ◽  
Economic Losses ◽  
Streptococcus Dysgalactiae ◽  
E Coli ◽  
Streptococcus Uberis ◽  
The Creation

Mastitis (Mastitis) is a polyethiological disease, which in most cases (95‒98%) occurs and develops as a result of ingestion of pathogenic microflora in the udder tissue, in particular staphylococci, streptococci, E. coli etc. Diseases of the mammary gland of cows cause significant economic losses to farms of different forms of property, which consist in not getting milk, reducing its quality and crayfish cows, in the first place high-yielding. In addition, the use of milk from cows sick for mastitis threatens the health of people, which is unacceptable.Mastitis occur in both high-yielding and low-productive animals, both, during lactation and in the dry period, regardless of the period of the year. The most widespread, out of all the diseases registered in large dairy commodities, tribal and farms with different forms of ownership is mastitis. Cows most often suffer from mastitis in the first days of the postnatal period, or 10‒15 days after calving, as well as in the period of intense lactation.We emphasize that the creation of new and improved existing anti-mastics preparations, as a rule, are done through the development of multicomponent preparations, which include several active substances from different classes of chemical compounds, which must complement each other in the spectrum of antimicrobial activity.Owing to this, there is a need for advanced research on the creation of more effective anti-mastitis preparations, while those which would not leave residues in tissues and products.Taking into account all abovementioned, the microbiological studies were conducted on 29 samples of milk from cows suffering from clinical and subclinical mastitis in the detection of pathogens. In particular, it was found that for the clinical form of the mastitis, the most commonly isolated monoculture was Staphylococcus aureus (33.7%), Streptococcus agalactiae (29.4%), and in the association of Streptococcus agalactiae and Staphylococcus aureus (22.5%). In the subclinical form of mastitis, the following cultures were identified in the association: Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus agalactiae and Streptococcus dysgalactiae (41.6%); Streptococcus dysgalactiae, Streptococcus agalactiae and Streptococcus uberis (30.4%) Staphylococcus aureus and Staphylococcus epidermidis (24.1%). 

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