FIELD REPORT
Bacteriological study of the egg shell of laying hens housed in cage and floor I. A. CarreraA, J. A. QuintanaA, C. RosarioA, and J. C. Del RíoB A Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México B
Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México
16
Eggs from 10 commercial brands were selected in different types of housing: cage and on the floor (free of cage) obtained from 4 supermarket chains to compare them in the bacteriology laboratory of the Department of Medicine and Bird Husbandry of the FMVZ of the UNAM, in order to determine the presence of Enterobacteria in shell. Shell washes were performed with PBS in a sterile environment, to then place 1 ml of the wash in nutritious broth. They were sown in Agar Bilis Red and Violet. The samples were stained with Gram, 3% KOH and biochemical tests (TSI, urea, citrate, LIA, SIM and ornithine)
- field report -
