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                Review
                
                
                11.  
                
                      
                      An overview on 
                epidemiologic 
                      investigations of infectious coryza - 
                      
                      Gayatri 
                      Rajurkar, Ashish Roy and Mahendra Mohan Yadav
                      
                      
                            Veterinary
                            World 2(10):
                      401-403
              
               
              
              
              
   
 
              
               
               
               
              
              
              Abstract
              
              
                            Among 
                            infectious diseases, Infectious coryza is one of the 
                            major problems affecting commercial poultry industry 
                            in the developing country like India. It is an upper 
                            respiratory tract disease of chickens caused by 
                            Haemophilus paragallinarum. The economic impact of 
                            the disease is mainly due to increased number of 
                            culls and significant reduction (10 to 40 %) in egg 
                            production, especially on multi-age farms (Blackall 
                            et al., 1997). The research work on infectious 
                            coryza so far in India is so scanty that does not 
                            provides necessary impact analysis of the disease on 
                            the commercial poultry rearers in the country. This 
                            paper presents an overview of the occurrence of the 
                            disease in India and other countries. The paper 
                            compares the economic losses to the poultry owners 
                            due to the disease in developed and developing 
                            countries.
                            Keywords: Epidemiology, Infectious Coryza, 
                            Investigation, Poultry, Economy, Incidence, 
                            Serotype.