Detection of residues of commonly used antibiotics in chicken eggs in selected farms in the eastern part of the Province of Rizal / Jesica Casanova Infante.

Thesis Bachelor of Science in Environmental Science University of Rizal System Tanay 2019

Includes bibliographical references.

The study aimed to determine the residues of commonly used antibiotics in chicken eggs in selected farms in the eastern part of the Province of Rizal. Descriptive method of research was employed coupled with laboratory analysis. Interview with the farm personnel guided with the questionnaire were done to gather the data. The Profiles of the three farms located in Pililla, Morong and Baras, respectively were determined through the interview conducted with the farm personnels or respondents. Pililla farm has the largest farmland followed by Baras and lastly, Morong. The two farms Pililla and Baras, employ the highest number of personnel compared to Morong. Pililla has highest numbers of layer hens raised, layer houses and chicken eggs produced. This farm practiced "force moulting" where matured layer hens were forced to lay eggs at the age of 80 - 104 weeks. The three farms used Layer Mash 1 feed for their laying hens. Baras formulated their own feeds while Morong and Pililla used commercial type of feeds. Antibiotics are administered to the layers via feeds and water. The dosage of antibiotics is based on the weight of layer hens. The eggs produced in Morong farm is medium, Pililla and Baras is small at the time of sample collection. There are only few, which are classified as supper pullet and extra-large. Residues of the common antibiotics such as Oxytetracycline, Chlortetracycline, Doxycycline and Tiamulin were not detected on the egg tissues.