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Pozostalosci antybiotykow i innych substancji hamujacych w mleku

100%

Rybinska K. , Postupolski J. , Szczesna M.

Roczniki Państwowego Zakładu Higieny

1995

tom 46

nr 3

239-241

Badania wykonane w latach 1990-1993 wykazały obecność antybiotyków w ok. 20% próbek mleka.

The aim of the study was determination of the contamination of raw milk, milk for consumption and powdered milk with antibiotics and inhibitory substances. The study was carried out in the years 1990-1993 with the assistance of the Province Sanitary-Epidemiological Stations using methods agreeing with the Polish Norms 91/A-86033: the enzymatic test Penzym, the microbiological tests S.STD Polulest and the plate method. In all, 16334 samples were tested. Depending on the method used the number of positive samples was: in raw milk: from 13.1 to 22.4% in milk for consumption: from 10.5 to 19.5% in powdered milk: from 12.9 to 18.2%. These results point out that the health quality of milk is insufficient, both milk for processing and milk in the market failing to meet the standards. The source of the seem to be inadequate hygienic conditions during milking and, especially, failure to meet the necessary requirements for keeping the time period during which milk is not suitable for consumption after treatment with antibiotics.

Interrelations between year season and raw milk hygienic quality indices

100%

Kuczaj M.

Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry

2001

tom 04

nr 1

The aim of this study was to evaluate milk hygienic quality and to determine a relationship between season of year and raw milk quality indices. The experiment was carried out on 38 samples of milk collected from 80 highproduction cows managed in a leading cattle breeding centre in southwest Poland. The analysis comprised total bacteria count, somatic cell count in 1 cm3 of milk, chemical composition assay, i.e. fat and protein content, freezing point determination and test for inhibitory substances. The quality of milk was evaluated instrumentally, and the analysis for inhibitory substances was done using Delwotest assay. Both chemical composition and hygienic quality were within the standard set for the Extra class of raw milk. The season of year significantly influenced the chemical composition of milk and somatic cell count, however, it has no effect on freezing point or total bacteria count.

Badania modelowe mleka zawierajacego substancje hamujace.I.Czulosc testow mikrobiologicznych w wykrywaniu substancji hamujacych oraz badania zmian zmetnienia mleka

88%

Wieczorek J. , Wieczorek Z. J. , Smoczynski S. S.

Roczniki Państwowego Zakładu Higieny

1993

tom 44

nr 4

387-394

Do badań użyto próbek mleka surowego z fermy wzorcowej, do którego dodawano wybrane środki chemii gospodarczej znajdujące się w handlu oraz penicylinę krystaliczną. Wyznaczono najmniejsze stężenia hamujące wzrost szczepu wzorcowego w dwóch testach mikrobiologicznych. Zbadano zmiany zachodzące w rozproszeniu światła przez mleko pod wpływem obecności substancji hamujących.

In the present studies use was made of raw milk derived from a model farm in the Olsztyn voivodeship. Washing and washing-disinfecting agents: Mirax, Bis, Radion, Iosan CP, Rudlak and lxi, as well as crystalline penicillin were added to milk. Their lowest concentrations inhibiting growth of indicator strain (MIC): Bacillus stearothermophilus var. calidolactis C 953, were determined by two microbiological tests. Moreover, the changes in light diffusion by milk, caused by the applied inhibitory substances, were examined. It was found that the microbiological tests for the determination of the lowest inhibitory concentration of the sanitization agents and of penicillin were much more sensitive in the case of milk with a 0.05% fat content, as compared with whole milk.

Ocena jakosci mleka w Czeskiej Republice

75%

Tousova R. , Stadnik L. , Jezkova A.

Biuletyn Informacyjny. Instytut Zootechniki

2002

tom 40

nr 2

99-104