author(s)
N Kalita, N Pathak, M Ahmed, P Deka and B Barkataki

abstract
The present study was undertaken to study the etiopathology of dead-in-shell embryos of chicken egg collected from the Kamrupa and Dahlem Red bird being maintained at the experimental poultry farm of “All India Co-ordinated Research Project on Poultry Breeding”, Guwahati-22 during the period from February, 2014 to March, 2014. In total 2270 numbers of egg were incubated of which 1250 nos. from Kamrupa and 1020 nos. from Dahlem Red bird. Out of which 184 (58.97 %) and 143 (47.35 %) nos. of egg were found dead-in-shell in case of Kamrupa and Dahlem Red bird, respectively. Various abnormalities detected in the dead-in-shell embryos of Kamrupa and Dahlem Red bird were malposition, malformation, dehydration, adhesion, pathological condition. Out of 37 nos. and 33 nos. of dead-in-shell embryos of Kamrupa and Dahlem Red bird, respectively 13 nos. of embryos in each of the breeds showed septicemia. The organism isolated from the embryos of both the variety was Streptococcus. spp, Staphylococcus spp. and Escherichia coli.