background: industrial copper ingest is a common form of poisoning in animals. zinc has an important role in the physiology of spermatozoa, in sperm production and viability. objective: this study was set to investigate whether the adverse effects of long term copper consumption on quality of rat spermatozoa could be prevented by zinc therapy. materials and methods: forty eight mature (6-8 week...

On a goose farm with 7600 geese kept in 6 houses, 730 birds in 2 houses died within a single day. After drinking, a certain proportion of geese in the affected houses exhibited trembling, salivation, lachrymation and respiratory distress followed by convulsions, dullness and prostration. The birds died soon after the onset of clinical signs. Postmortem examination revealed the presence of a lar...

ergovaline, the main ergopeptine alkaloid produced in tall fescue ( fescue arundinacea schreb.) infected with endophyte ( neotyphodium coenophialum morgan- jones & gams), is known to cause tall fescue toxicosis. this study was conducted to examine the presence of fungal endophytes in five populations of tall fescue collected from various regions of iran. the existence of neotyphodium mycelia in...