Abstract
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.
Highlights
Cilj ovoga rada je bio da se ispita antimikrobna aktivnost dezinficijensa dodicin-hidrohlorida, odnosno preparata koji u sebi sadri ovaj dezinficijens (DESU® M) protiv bakterija, naj~e{}ih prouzrokova~a mastitisa kod krava
Rezultati kvantitativnog testa prikazani u tabeli 5 pokazuju da modifikovani preparat DESU® M, pri organskom optere}enju (2% mleko), redukuje broj bakterija Escherichia coli za 6,54 log CFU/ml za 30 sekundi, Staphylococcus aureus za 5,84 log CFU/ml za 30 sekunda, Streptococcus agalactiae za 5,43 log CFU/ml za 30 sekundi i Streptococcus uberis za 5,88 log CFU/ml za 30 sekundi
Rezultati ispitivanja efikasnosti modifikovanog preparata DESU®M sa organskim optere}enjem (4 % mleko) / Results of examination of efficacy of modified preparation DESU® M with organic material (4% milk) Rezultati ispitivanja efikasnosti modifikovanog preparata DESU®M, pri organskom optere}enju (4% mleko) i pri temperaturi ambijenta 20 oC, prema bakterijama Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae i Streptococcus uberis, prikazani su u tabeli 6
Summary
Rezultati prikazani u tabeli 1 pokazuju da je modifikovani preparat DESU® M veoma efikasno uni{tio sve ispitivane mikroorganizme za 30 sekundi. Rezultati ispitivanja efikasnosti modifikovanog preparata DESU®M sa organskim optere}enjem (2% mleko)/ Results of examination of efficacy of modified preparation DESU® M with organic material (2% milk) Rezultati ispitivanja efikasnosti preparata DESU® M, pri organskom optere}enju (2% mleko), prema bakterijama Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae i Streptococcus uberis, prikazani su u tabeli 2. Rezultati ispitivanja efikasnosti modifikovanog preparata DESU®M sa organskim optere}enjem (4% mleko) / Results of examination of efficacy of modified preparation DESU® M with organic material (4% milk) Rezultati ispitivanja efikasnosti modifikovanog preparata DESU® M pri organskom optere}enju (4% mleko) prikazani su u tabeli 3. Rezultati ispitivanja efikasnosti modifikovanog preparata DESU® M, pri organskom optere}enju (2% mleko) i pri temperaturi ambijenta 20 oC, prema bakterijama Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae i Streptococcus uberis, prikazani su u tabeli 5. Antimikrobna efikasnost modifikovanog preparata DESU® M sa organskim optere}enjem (2% mleko) /
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