GGRB28H3 Lecture : in class lecture note
Document Summary
Respiratory infection transmitted via respiratory secretions with incubation of ~1-5 days. Seasonal december/march survives better in dry environments with little sun. Symptoms: fever, chills, body aches, sore throat, non-productive cough, runny nose, headache [may lead to respiratory problems/pneumonia. People who have weak immune system, infants, pregnant women, more subject. Spanish flu mainly affected people ages 20-25. Type a: most virulent, accentuates and mutates. Type c: humans & some animals (dogs/pigs) Zoonosis: transmission of virus between species (e. g. pigs to humans, or pigs to birds) Avian influenza (amongst birds), pandemic influenza (causes global outbreak), seasonal influenza. Type a affects domestic and wild species. Capable of killing, <50% of those who contract it will die. Occurs when human/bird contact increases but does not transmit human to human. Aquatic birds are natural reservoirs --- can affect chickens/turkeys. 218 poultry cases from 2003-2006, >124 human deaths (deaths in ferrets, felids, domestic cats) High density spreads influenza [poultry centres co-located with humans]
