Dynamic range expansion leads to establishment of a new, genetically distinct wolf population in Central Europe.

Local extinction and recolonization events can shape genetic structure of subdivided animal populations. The gray wolf (Canis lupus) was extirpated from most of Europe, but recently recolonized big part of its historical range. An exceptionally dynamic expansion of wolf population is observed in the western part of the Great European Plain.

Epizootiological examination of a respiratory disease associated with mycoplasma infection in horse.

The authors examined 585 samples from 92 mares of 2 studs and 346 nasal swabs taken from their foals for the presence of mycoplasmas. The positive rates of mares and foals were 81.5% and 71.

Immunoglobulin concentration in the blood serum of foals suffering from pneumonia associated with mycoplasma infection.

Clinical, microbiological, haematological, and immunological investigations were carried out in mares and their foals of 2 studs. A considerable number of foals fell ill with pneumonia, the mortality rate was high. Mycoplasmas were mostly isolated from nasal swabs and from the lungs.

Mycoplasma infection as disposing factor to Streptococcus dysgalactiae mastitis.

The authors studied a synergistic effect of an arginine hydrolising, but glucose negative mycoplasma strain (9293/3/2/1) and Streptococcus (Str.) dysgalactiae. Both agents, as mono-infections, caused only slight mastitis, but if the udder had been previously infected with mycoplasma, Str.