U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Food and Feed Safety Research: College Station, TX
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Plains Area College Station, Texas Southern Plains Agricultural Research Center Food and Feed Safety Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Harvey, Rogeritem
                                            FARRINGTON, L - TEXAS A&M UNIVERSITYitem
                                            Buckley, Sandra

                                                         - *Sandy*item
                                            Stanker, Larryitem
                                            INSKIP, P - TEXAS A&M UNIVERSITY
  Submitted to: International Symposium on Epidemiology and Control of Salmonella in Pork
                                    Publication Type: Proceedings
                                    Publication Acceptance Date: 8/20/1999
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary: There is increasing concern about the emergence of antibiotic resistant bacteria and their threat to human health. It has been questioned whether the use of antibiotics in animal production has promoted antibiotic resistance. We studied the antibiotic resistance patterns of Salmonella bacteria isolated from swine in a commercial operation. This is important  from a public health standpoint because it will allow us to correlate resistance patterns with antibiotic usage in animals and to see if there is any carryover of resistance into human medicine.
                                Technical Abstract: We conducted a survey of antibiotic resistance in Salmonella isolated from market-age swine at five different farms. Samples were taken from the lymph nodes and cecal contents at the time of slaughter. Of the 559 Salmonella isolates recovered, 420 were sent to the National Veterinary Services Laboratory for serotyping. Resistance patterns were determined by  disk diffusion using thirteen antibiotics, and 320 isolates were analyzed. Resistance was observed to ampicillin, chloramphenicol, chlortetracycline, nitrofurantoin, penicillin G, streptomycin and sulfisoxazole. Multi-drug resistance (resistance to two or more antibiotics) was observed in 183 isolates (57.2%) with 34 of these isolates (18.6%) resistant to three antibiotics and 26 (8.1%) resistant to four antibiotics. The most common three drugs resistance pattern consisted of chlortetracycline, penicillin G and streptomycin (37.3%). A significant difference was observed between  serotypes and between somatic serogroups in their antibiotic resistance patterns. Variation also was observed between farms and between seasons in which sampling occurred. As a step in understanding the connection between antibiotic use in agriculture and medicine and emergence of antibiotic resistant bacteria, programs that monitor the levels of antibiotic resistance must be continued. In animal production, where sub-therapeutic administration of antibiotics is extremely common, continued surveillance is especially important.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov