Über Wollschädlinge und Wollschutz

Ohne Zusammenfassung Mit 19 Abbildungen.     

Der Apfelblattsauger

Ohne Zusammenfassung     

Identification and distribution of a novel Malassezia species yeast on normal equine skin

This study aimed to investigate the distribution of Malassezia species yeasts on the skin of healthy horses. Acetate tape samples were obtained from the lip, axilla, interbulbar region, groin and anus of 12 healthy horses. The samples were stained and examined microscopically and sites harbouring yeast-like organisms were identified. Contact plates were applied to the skin at these sites and cultured at 26 degrees C and 32 degrees C. No growth was obtained on horse blood, Sabouraud's dextrose or modified Dixon's agar. A pure growth of a Malassezia-type organism was obtained on Sabouraud's dextrose agar enriched with oleic acid when it was incubated at 30 degrees C. It was identified by 26S ribosomal DNA D1/D2 sequence analysis as a member of the genus Malassezia, and most closely related to Malassezia sympodialis. However, the level of sequence divergence indicated that it was a novel species.     

Fertility effects of crossing thoroughbreds with don mares

Pregnancy rates, foal-heat conception rates, early and late embryo loss, polyovulations and delivery loss were compared on a Russian breeding farm between Don mares with a low percentage of Thoroughbred (TB) blood and those with more than 25% TB blood, called Budenny mares. The overall pregnancy rate in the two groups was not significantly different; 85.5% and 85.6%, respectively. There was a significant difference in the foal heat conception rate, with the Don mares at 54.9% and the Budenny mares at 50.3%. Embryo loss before Day 100 was only 4.9% for the Don mares, but was 9.1% for the Budenny mares. Embryo loss after Day 100 was similar in the two groups; 10.2% for the Don mares and 9.0% for the Budenny mares. The loss of foals in the process of delivery was 3.3% for the Don mares and 5.0% for the Budenny mares. Estrous cycles with polyovulations was 8.7% for the Don mares and 13.1% for the Budenny mares.