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1

Program weterynaryjnej opieki nad stanem zdrowia w stadach krow mlecznych

100%
Baranski W., Zdunczyk S., Janowski T., Kruif A. de, Opsomer G., Dewulf J.
Medycyna Weterynaryjna
|
2005
|
tom 61
|
nr 01
14-18
2

Zaburzenia rozrodu i wybrane wskazniki plodnosci w stadach krow mlecznych objetych programem opieki lekarsko-weterynaryjnej

100%
Baranski W., Janowski T., Ras M., Zdunczyk S., Opsomer G., Dewulf J., De Kruif A.
Medycyna Weterynaryjna
|
2008
|
tom 64
|
nr 06
807-811
Reproduction control is a very important part of the herd health program. It has been observed that fertility declines in herds with increased milk yield. Changes in Polish agriculture, including dairy cattle, have been implemented for about 15 years. The aim of this study was to evaluate the incidence of reproduction disorders and different fertility indices in dairy cattle. The study was carried out in 8 dairy herds in North-East Poland with the herd health control and with milk yields from 5200 to 8200 l. The obtained results showed that the incidence of clinical forms of reproduction disorders differed significantly (p ≤ 0.05-0.01) among herds and their value were as follows: abortion rate - 4.0% (1.3-7.1%); retained placenta - 9.7% (5.7-15.6%); endometritis - 18.3% (5.7-42.7%); silent heat - 32.1% (12.5-49.2%); cystic ovarian disease - 7.1% (0-17.7%) and ovarian afunction 7.6% (1.4-16.9%). The intercalving period was 399.7 ± 62.8 days and the culling rate because of reproduction failure was 4.6% (0-9.1%). Reproduction indices describing the quality of artificial insemination were good and carried out as follows: first insemination rate was 52.3% (44-65.3%), service per conception rate was 1.8 (1.5-2.1). The study showed that the most important factor for a longer intercalving period was silent heat. It was likewise observed that the prevalence of ovarian malfunctioning and ovarian cysts as well as endometritis was lower.
3

Udder pathogens isolated from milk of cows before drying off and their antibiotic sensitivity

84%
Baranski W., Ras M., Janowski T., Zdunczyk S., Dewulf J., De Kruif A., De Vliegher S., Opsomer G.
Medycyna Weterynaryjna
|
2008
|
tom 64
|
nr 03
The aim of this study was to describe the incidence of bacteria and fungi in the milk of dairy cows at the moment of drying off in 8 herds in North-East Poland. Additionally, tests for antibiotic sensitivity of the isolated bacteria were performed. In total, milk samples of 1145 quarters of 288 cows were examined. In 41 cows coagulase negative staphylococci (CNS) were isolated, while Strep. agalactiae was isolated in 22 cows, Strep. uberis in 18 cows, Staph. aureus in 16 cows, E. coli in 10 cows, Strep. dysgalactiae in 3 cows, and Arcanobacter pyogenes in 1 cow. Fungal infections were found in 28 cows. The lowest level of antibiotic resistance among the isolated CNS strains was found for cefquinome, Nafpenzal® and cephalexin while the highest number of resistant strains was found when novobiocin and streptomycin were tested. For Strep. agalactiae the lowest resistance level could be found when cefquinome and cephoperazone were tested, while the highest level was found for streptomycin and kanamycin. When testing Strep. - uberis the less resistance was found for cefquinome, cephalexin and Nafpenzal® and the highest for streptomycin and kanamycin. Staph. aureus strains were mostly sensitive for amoxicillin with clavulanic acid and Nafpenzal®, while streptomycin and neomycin were found to have the highest resistance level. The results of the present study show that bacteria can be isolated in the milk of one third of the cows at the moment of drying off and that resistance levels among the isolated bacteria were lowest for cephalosporins.
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