author(s)
Dr. A Deka, Dr. M Talukdar, Dr. Kabita Sarma, Dr. J Rajkhowa, Dr. S Sarma, Dr. J Goswami and Dr. JD Mahanta

abstract
Duck is one of the most important species in poultry industry and intensifying farming. The Pati duck population constitutes a major indigenous duck variety in the state of Assam. In present study, forty-five apparently healthy Pati ducks at irrespective of sex were grouped into five as per their ages where each group contained nine birds. The cervical lymph nodes were observed from 4th week of age of Pati duck. The gross shapes of the cervical lymph node were elongated to spindle shaped. The lumbar lymph nodes were found from the 16th week of age of Pati duck. The lumbar lymph nodes were elongated. The length, breadth, thickness and weight of the cervical and lumbar lymph node showed an increasing trend with advancement of age.