[The effect of selected preparations for the protection of draft horses against dipterous blood-sucking insects]. / Ucinnost vybraných preparátu k ochrane tazných koní pred dvoukrídlým hmyzem sajícím krev.

Dipterous blood-sucking insects (horseflies, black flies, gnats, midges) have negative impacts on the performance of draught horses in forest enterprises. For the protection of these animals, the following preparations were applied at the interval of 24 hours: diethyltoluamide, Oxamat (N,N-diethyloxamine acid, USSR) and Stomoxin (synthetic pyrethroid, product of the firm Wellcome, England). In the course of 66 working days, the performance of test animals treated with 10% water emulsion of diethyltoluamide increased by 49.25 cu. m. of skidded wood, i.e. by 0.74 cu. m. wood per horse/day (21.65%), as compared with the control group. The daily savings of prime costs per test horse/day made 16.99 Kcs (Czechoslovak crowns). In comparison with the control group, the performance of horses treated with 5% water emulsion of Oxamat increased by 85.50 cu. m. wood, i.e. by 1.29 cu. m. wood per horse/day (38.00%). Stomoxin at the concentration of 0.05% acted as a good insecticide but had no marked repellent effect. The results of this study document that the production of effective repellents should be introduced in the Czechoslovak Socialist Republic.

[Stimulatory and metabolic effects of Ridizol P in the fattening of pigs]. / Stimulacní a metabolické ucinky Ridzolu P u prasat ve vykrmu.

Fattened pigs (from 20 to 100 kg of body weight) given Ridzol P (6 g per 100 kg of mixture) were found to grow more quickly (by 8.1%) and to convert the feed mixtures more efficiently (A 1 by 6.6%, SOL by 3.9%). Twenty indicators of the metabolism were determined in serum, plasma, liver, and supra-renal gland after 110 days of Ridzol P administration. The changes in the concentrations of the total protein and urea suggest that the stimulative action of Ridzol P is based on better conversion of feed protein. The levels of vitamin A and E were increased in the blood plasma of the tested group. The content of vitamin A in the liver was significantly higher. The dry weight of the muscular and liver tissue of the tested animals was lower; the content of nitrogen compounds increased and the content of fat decreased in the muscular tissue of these animals.

[Treatment of mastitis during the dry period of cows using the preparation Orbenin-dry cow]. / Lécba zánetu mlécné zlázy v období zaprahnutí prípravkem Orbenin-dry cow

The paper describes the study of the extent to which the use of the Orbenin -- dry cow preparation (with cloxacillin as the active substance) was successful in the treatment of mastitis caused by Streptococcus agalactiae. Effectiveness was evaluated on the basis of the bacteriological examination of the udder-quarter samples of milk obtained from the tested cows immediately before getting dry and after the resumption of lactation. The preparation was applied in a single dose at the beginning of the dry period at the rate of 500 mg cloxacillin per 1 udder quarter. In the first herd 11 cows were treated with a positive finding (str. agalactiae, penicillin-resistant) in 26 quarters. In two control examinations the causative agent was always detected in one quarter (not in the same), i. e. in 3.8% of the initial number. In the second herd the causative agent (sensitive to penicillin) was found in 67 quarters before treatment (the total number of cows tested being 25); after treatment it was found in two cows in one quarter in each case (3.0% of the initial number). In an informative testing of effectiveness, the Orbenin L. A. preparation, designed for lactating cows, was applied repeatedly (3 times with 48-hour intervals) to six cows with subclinical streptococcal mastitis (Str. agalactiae, penicillin-resistant, detected in 11 quarters). After treatment the causative agent was found only in one quarter during the second examination. The therapeutic effect can be considered very good; the form of the drug and the method of its application allow for prompt and easy application.

[Effectiveness of Nilzan and Dovenix in the treatment of fascioliasis in cattle and sheep]. / Overení prípravkü Nilzan a Dovenix pri motolicnatosti skotu a ovcí

The authors tested the effectivity of the foreign preparations Nilzan (tetramisole ++ oxyclozanide) and Dovenix (nitroxynil) in the treatment of cattle and sheep naturally invaded by Fasciola hepatica. The effectiveness of the two preparations was evaluated on the basis of the results of coprological examination in the test and control animals prior to treatment and in two intervals after treatment. In slightly invaded cattle (the average egg number in 3 g of faeces in 28 test cows was 1.46 per animal) the last examination (4 weeks after treatment) showed 100-per-cent extenseffectiveness and intenseffectiveness of both preparations. When the test was finished in sheep (average number of eggs in 3 g of faeces in 45 test ewes--5.40 per animal) six weeks after treatment, the EE of Nilzan was 86.7% and IE 97.4%; in Dovenix EE was 93.4% and IE 99.0%. Both preparations were accepted well, without any side-effects or unfavourable phenomena related to their application.

[Laboratory control of disinfectant effectiveness of sodium dichlorisocyanurate]. / Laboratorni kontrola dezinfekcni úcinnosti dichlórizokyanurátu sodného

The level of active chlorine was determined to reach 59% in the first part of the trial; this corresponds to data asserted by the producer. In the solubility test, the preparation was classified as well-soluble. The determined sodium dichlorisocyanurate dilution coefficient suggests that increasing concentrations of the active substance do not imply any significant reduction of the time needed for exposure, and considering the value of the temperature coefficient (1.166) use can be considered as possible at different temperatures of environment, especially at lower temperature levels. During the effectiveness determinations on tissue carriers, 100% disinfecting effect was achieved at a 0.1% weight concentration per volume after five minutes of exposure against E. coli and Staph. aureus germs. For brief information, theeffectiveness of sodium dichlorisocyanurate on the spores of Bacillus subtilis was also examined. At the concentrations of 0.1% and 1% weight per volume, no favourable result was obtained even after 120 minutes of exposure. When buliding material was used as carriers (metallic sheets, bricks, wood, concrete) the total of 192 smears were prepared. Each of the carriers was adjusted in two positions--horizontal and vertical. 100% effectiveness against the germs of S. aureus was obtained at the concentration of 0.35% active chlorine (0.6% wt. per active chlorine concentration as ls carriers in the Chloramin B comparative test (28% act. chlorine). The comparison of effectiveness on the basis of the same concentrations of active chlorine in both chemicals revealed that sodium dichlorisocyanurate is repeatedly effective at a 0.020% active chlorine concentration. In Chloramin B the active concentration was 0.13% active chlorine.