Navigation Links
Milk may help bacteria survive against low levels of antibiotics
Date:9/7/2008

Milk may help prevent potentially dangerous bacteria like Staphylococcus from being killed by antibiotics used to treat animals, scientists heard today (Monday 8 September 2008) at the Society for General Microbiology's Autumn meeting being held this week at Trinity College, Dublin.

Bacteria sometimes form structures called biofilms that protect them against antibiotics and the body's natural defences. Now scientists have discovered that one of the most important micro-organisms that causes mastitis in cows and sheep, called Staphylococcus, can evade the animal's defences and veterinary medicines by forming these protective biofilms. Mastitis is an infection of the udder in cattle and sheep. It is often a painful condition for the cows and can even cause death.

"Mastitis is a difficult disease to control. It causes risks for public health if people drink infected milk and is expensive for farmers as it usually causes severe milk production losses, increased treatment costs and means the animals may have to be culled," said Dr Manuela Oliveira from the Faculty of Veterinary Medicine at the Technical University of Lisbon, Portugal. "When the staphylococci produce a biofilm, the structure protects them against host defences and antibiotic treatment, allowing the bacteria to persist in the udder."

In the past, scientists studying mastitis have conducted most of their experiments under laboratory conditions rather than mimicking the conditions found in living animals. This may mean that they have missed important contributory factors. However, Dr Oliveira and her colleagues have used realistic conditions to overcome this problem.

"We have discovered that milk may also protect bacteria against low concentrations of antibiotics in the presence of milk, three of the five antibiotics tested, penicillin, gentamicin and sulphamethoxazole combined with trimethoprim, were less effective against Staphylococcus when compared with the same experiment performed in the absence of milk," said Dr Oliveira.

The Lisbon team is currently trying to identify the correct antibiotic concentrations needed to stop biofilms forming in the first place and also the concentrations needed to destroy a biofilm that has already formed. The scientists are also looking at the influence of the forces acting inside an udder during milking to see whether these help or hinder the bacteria in producing biofilms.

"This will allow for a better control of staphylococcal mastitis, cut disease costs and give an important improvement in the protection of consumers' health," said Dr Manuela Oliveira. "If we can get the doses right, and the animals are cured quicker, we will have less antibiotic residue in the environment and the risk of bacteria such as Staphylococcus aureus developing and spreading antibiotic resistance is lower."


'/>"/>

Contact: Lucy Goodchild
l.goodchild@sgm.ac.uk
44-078-248-83010
Society for General Microbiology
Source:Eurekalert

Related biology news :

1. Energy-saving bacteria resist antibiotics
2. Scientists a step closer to producing fuel from bacteria
3. Bacterial persistence in streams
4. Syracuse University scientists discover how some bacteria may steal iron from their human hosts
5. Bacteria reveal secret of adaptation at Evolution Canyon
6. Food scientists confirm commercial product effectively kills bacteria in vegetable washwater
7. Thinking ahead: Bacteria anticipate coming changes in their environment
8. Test of bacteria toxin delivery system could pave way for new antibiotic drugs
9. A survivor in Greenland: A novel bacterial species is found trapped in 120,000-year-old ice
10. Study finds healthy intestinal bacteria within chicken eggs
11. Bacteria feed on earths ocean-bottom crust
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/16/2016)... May 16, 2016   EyeLock LLC , a ... the opening of an IoT Center of Excellence in ... expand the development of embedded iris biometric applications. ... of convenience and security with unmatched biometric accuracy, making ... aside from DNA. EyeLock,s platform uses video technology to ...
(Date:4/28/2016)... First quarter 2016:   , ... the first quarter of 2015 The gross margin was ... 18.8) and the operating margin was 40% (-13) Earnings ... flow from operations was SEK 249.9 M (21.2) , ... SEK 7,000-8,500 M. The operating margin for 2016 is ...
(Date:4/15/2016)... DUBLIN , April 15, 2016 ... of the,  "Global Gait Biometrics Market 2016-2020,"  report ... http://photos.prnewswire.com/prnh/20160330/349511LOGO ) , ,The global gait ... CAGR of 13.98% during the period 2016-2020. ... movement angles, which can be used to compute ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... (PRWEB) , ... May 26, 2016 , ... ... FireflySci cuvettes are used in leading laboratories all over the globe. Their ... , In addition to manufacturing awesome cuvettes, FireflySci makes spectrophotometer calibration standards that ...
(Date:5/25/2016)... Oregon (PRWEB) , ... May 25, 2016 , ... ... Set features a variety of fracture-specific plating options designed to address fractures of ... industry-leading fracture fixation solutions. , The Acumed Ankle Plating System 3 is composed ...
(Date:5/25/2016)... ... , ... Scientists at the University of Athens say they have evidence that ... the research that could lead to one good one. Surviving Mesothelioma has just posted ... , The team evaluated 98 mesothelioma patients who got a second kind ...
(Date:5/25/2016)... ... May 25, 2016 , ... Biohaven Pharmaceutical ... (FDA) has granted the company’s orphan drug designation request covering BHV-4157 for the ... granted by the FDA. , Spinocerebellar ataxia is a rare, debilitating neurodegenerative ...
Breaking Biology Technology: