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What is Bird Flu (H5N1) and How is it Evolving? • Ricochet Science
In 1878 Dr. Eduardo Perroncito, an Italian veterinarian who specialized in pathology, noticed something strange. Poultry in a few villages began to become sick. These were symptoms he had never observed before in chickens, turkeys and other birds. The bright red combs on the tops of their heads and the wattles that dangle below their chins took on a purple discoloration, and so did their legs. The birds were having a hard time standing upright, their appendages swollen, appetite diminished, and egg production low. They were coughing and sneezing; some would even drop dead without exhibiting any symptoms at all.