title: Antibiotic residues in milk and eggs of commercial and local farms at Chittagong, Bangladesh.
abstract: OBJECTIVE
  The study was conducted to detection and determination of concentration or level of antibiotic residues in milk and egg of local and commercial farms at Chittagong during December 2011 to June 2012.
  
  
  METHODS
  A total of 400 (200 milk and 200 egg) samples were collected from local and commercial dairy cows and local scavenging and commercial poultry farms, respectively. Microbial inhibition test and thin layer chromatography were used for screening and ultra-high performance liquid chromatography was used to estimate the concentrations of antibiotic residues in samples.
  
  
  RESULTS
  Tetracycline, amoxicillin, and ciprofloxacin residues were significantly (p ≤ 0.05) higher in commercial farms than local. The boiling insignificantly (p>0.05) reduced residues level in milk and egg. The average concentrations of amoxicillin residue in local milk, commercial milk, local egg, and commercial egg were 9.84 µg/ml, 56.16 µg/ml, 10.46 µg/g and 48.82 µg/g, respectively, in raw samples and were reduced to 9.81 µg/ml, 55.54 µg/ml, 10.29 µg/g, and 48.38 µg/g, respectively, after boiling.
  
  
  CONCLUSIONS
  Proper maintaining of the withdrawal period and development of active surveillance system are highly recommended for public health security.
authors.affiliation: Department of Livestock Services, Upazilla Livestock Office, Rangamati Sadar, Rangamati Hill Tracts, Bangladesh; Department of Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4225, Bangladesh.
authors.forename: Suchayan
authors.initials: S
authors.lastname: Chowdhury
authors.affiliation: Department of Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4225, Bangladesh.
authors.forename: Mohammad Mahmudul
authors.initials: MM
authors.lastname: Hassan
authors.affiliation: Department of Animal Science and Nutrition, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4225, Bangladesh.
authors.forename: Mahabub
authors.initials: M
authors.lastname: Alam
authors.affiliation: Department of Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4225, Bangladesh.
authors.forename: Sarmina
authors.initials: S
authors.lastname: Sattar
authors.affiliation: Department of Dairy and Poultry Science, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4225, Bangladesh.
authors.forename: Md Saiful
authors.initials: MS
authors.lastname: Bari
authors.affiliation: Department of Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4225, Bangladesh.
authors.forename: A K M
authors.initials: AK
authors.lastname: Saifuddin
authors.affiliation: Department of Physiology, Biochemistry and Pharmacology, Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4225, Bangladesh.
authors.forename: Md Ahasanul
authors.initials: MA
authors.lastname: Hoque
keywords: antibiotic residues; commercial; eggs; local; milk; thin-layer chromatography; ultra-high-pressure liquid chromatography