+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Susceptibilities of bovine summer mastitis bacteria to antimicrobial agents



Susceptibilities of bovine summer mastitis bacteria to antimicrobial agents



Antimicrobial Agents and ChemoTherapy 40(1): 157-160



The susceptibility to 9 antimicrobial agents of 32 aerobic bacterial isolates and to 10 antimicrobial agents of 37 anaerobic bacterial isolates from 23 cases of bovine summer mastitis (16 Actinomyces pyogenes isolates, 8 Streptococcus dysgalactiae isolates, 3 S. uberis isolates, 3 S. acidominimus isolates, 2 Streptococcus spp., 15 Peptostreptococcus indolicus isolates, 10 Fusobacterium necrophorum isolates, and 12 isolates of anaerobic gram-negative rods) was determined by the agar dilution method. All isolates except one Bacteroides fragilis isolate (beta-lactamase producer) were susceptible to penicillin G, amoxicillin, amoxicillin-clavulanate, cefoxitin, clindamycin, and chloramphenicol (the B. fragilis strain was susceptible to the last four), which had MICs at which 90% of isolates were inhibited (MIC90s) of < or = 0.06, < or = 0.06, < or = 0.06 0.25, < or = 0.06, and 4.0 micrograms/ml, respectively. Spiramycin was active against the gram-positive aerobes (MIC90, 1.0 microgram/ml) but not against the anaerobes (MIC90, 16.0 micrograms/ml). Similar trends were noted for susceptibilities of aerobic and anaerobic bacteria to ofloxacin (MIC90s, 2.0 and 8 micrograms/ml, respectively). Occasional strains of aerobic streptococci were resistant to oxytetracycline, but all anaerobes were susceptible. Tinidazole was active against all anaerobes (MIC90, 2.0 micrograms/ml). beta-Lactamase was produced only by the B. fragilis isolate.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 002973222

Download citation: RISBibTeXText

PMID: 8787898

DOI: 10.1128/aac.40.1.157


Related references

Antibiotic susceptibilities of periodontal bacteria. In vitro susceptibilities to eight antimicrobial agents. Journal of Periodontology 56(11 Suppl): 67-74, 1985

Antimicrobial susceptibilities of Mycoplasma isolated from bovine mastitis in Japan. Animal Science Journal 85(1): 96-99, 2014

Antimicrobial susceptibilities of coagulase-negative staphylococci (CNS) and streptococci from bovine subclinical mastitis cases. Journal of Microbiology 48(3): 267-274, 2010

Accuracy of the E test for determining antimicrobial susceptibilities of staphylococci, enterococci, Campylobacter jejuni, and gram-negative bacteria resistant to antimicrobial agents. Journal of Clinical Microbiology 30(12): 3243-3248, 1992

Antimicrobial susceptibilities and bacteriological characteristics of bovine Pseudomonas aeruginosa and Serratia marcescens isolates from mastitis. Veterinary Microbiology 154(1-2): 202-207, 2011

Isolated bacteria and susceptibilities to antimicrobial agents in biliary infections. Hepato-Gastroenterology 52(63): 686-690, 2005

Bacteria isolated from intraabdominal infection and their susceptibilities to antimicrobial agents. Japanese Journal of Antibiotics 47(10): 1329-1343, 1994

In vitro susceptibilities of canine urinary bacteria to selected antimicrobial agents. Journal of the American Veterinary Medical Association 183(8): 863-867, 1983

Susceptibilities of gram-negative bacteria to combinations of antimicrobial agents in vitro. Antimicrobial Agents and ChemoTherapy 8(2): 164-171, 1975

Susceptibilities of anaerobic bacteria isolated from animals with ovine foot rot to 28 antimicrobial agents. Antimicrobial Agents and ChemoTherapy 36(1): 198-201, 1992

Bacteria isolated from surgical infections and its susceptibilities to antimicrobial agents. Special references to bacteria isolated between July 1994 and June 1995. Japanese Journal of Antibiotics 49(9): 849-891, 1996

Bacteria isolated from surgical infections and their susceptibilities to antimicrobial agents. Special references to bacteria isolated between April 1999 and March 2000. Japanese Journal of Antibiotics 55(6): 697-729, 2002

Bacteria isolated from surgical infections and its susceptibilities to antimicrobial agents--special references to bacteria isolated between april 2003 and march 2004. Japanese Journal of Antibiotics 60(2): 59-97, 2007

Bacteria isolated from surgical infections and its susceptibilities to antimicrobial agents--special references to bacteria isolated between April 2001 and March 2002. Japanese Journal of Antibiotics 56(2): 105-137, 2003

Bacteria isolated from surgical infections and its susceptibilities to antimicrobial agents--special references to bacteria isolated between April 2009 and March 2010. Japanese Journal of Antibiotics 64(3): 125-169, 2011