2.8. Blood samples and carcasses
Blood samples were collected in appropriated tubes and centrifuged
at 2000 g for 20 min. Serum was separated and stored at −80 °C until
analyses. Liver, kidneys and whole brain were removed, weighed and
frozen in liquid nitrogen, after kept at −80 °C. Carcasses were weighed
and stored at 4 °C or less.