Med. Weter. 68 (4), 193-256, 2012

REVIEWS

Neurohormonal basis of aggression in fish Kania B.F., Zawadzka E., Dębski B. [ summary ] 195

Clinical and anatomical conditioning of central nervous system degenerative diseases in animals Łuszczewska-Sierakowska I., Łada A. [ summary ] 199

Use of needle electromyography in diagnosis of neuromuscular diseases in dogs Monowid T., Bocheńska A., Pomianowski A. [ summary ] 205

Norovirus contamination of bivalve molluscs as a cause of gastroenteritis Bigoraj E., Chrobocińska M., Kwit E. [ summary ] 210

Role of coenzyme Q10 in humans and animals Janicki B., Buzała M. [ summary ] 214

Play as a basic factor of wellness, forming correct psychosomatic and social behaviour Karpiński M., Mazurkiewicz T., Czyżowski P.,
Goleman M. [ summary ] 218

Assessment criteria of animal experimentation for ethics committees Mroczkowski S., Frieske A. [ summary ] 222

ORIGINAL PAPERS

Reproductive performance of PLS and BCP ewes exposed to hCG at the follicular phase of the estrous cycle – in English Bobowiec R.,
Kosior-Korzecka U., Patkowski K., Gruszecki T., Tusińska E. [ summary ] 226

Virulence properties of Staphylococcus delphini strains isolated from domestic pigeons – in English Sudagidan M., Aydin A. [ summary ] 231

Prevalence of Escherichia coli in retail poultry meat, ground beef and beef – in English Eyí A., Arslan S. [ summary ] 237

Antimicrobial susceptibility of Yersinia enterocolitica strains isolated from pigs in the north-east region of Poland – in English Perkowska K.,
Platt-Samoraj A., Bancerz-Kisiel A., Szweda W. [ summary ] 241

Occurrence of Macrorhabdus ornithogaster in exotic and wild birds in Poland Piasecki T., Prochowska S., Celmer Ż., Sochacka A.,
Bednarski M. [ summary ] 245