Engineers Turn E. coli Into Tiny Factories for Producing New Forms of Popular Antibiotic
May 29th 2015Like a dairy farmer tending to a herd of cows to produce milk, researchers are tending to colonies of the bacteria Escherichia coli (E. coli) to produce new forms of antibiotics - including three that show promise in fighting drug-resistant bacteria. The research, which will be published May 29 in the journal Science Advances, was led by Blaine A. Pfeifer, an associate professor of chemical and biological engineering in the University at Buffalo School of Engineering and Applied Sciences. His team included first author Guojian Zhang, Yi Li and Lei Fang, all in the Department of Chemical and Biological Engineering.
Expanding Intravascular Catheter Surveillance: Issues and Obstacles
May 28th 2015Therapies administered via vascular access catheters are a mainstay of both acute and chronic medical treatment. In fact when all types of vascular catheters are combined, the category may well represent the largest type of invasive device used in healthcare. However their ubiquitous presence, ironically, makes it very difficult to measure with any degree of statistical precision their associated device utilization rates. The use of peripheral catheters (PIVs), for example, is so widespread in the United States that their use is obscured among other procedure codes, rather being coded separately, and recorded uniquely only in individual patient records. Aggregate data is absent in any administrative datasets. In general the frequency of catheter use must be inferred from the number of units sold by their various manufacturers. Today, this number reportedly exceeds 300 million but is at best an estimate.
Truly Getting to Zero: Theoretical Considerations for Elimination of CLABSIs
May 28th 2015If you have ever watched a fibrin sheath progress to a thrombus on the surface of a catheter -- a process that initiates instantly upon entry into the bloodstream and proceeds quickly, often in just minutes -- you will understand why the presence of contaminating bacteria on the surface of a catheter is something to be rigorously avoided. The rapidly forming fibrin sheath encases such surface bacteria, both shielding them and facilitating biofilm formation.
When Ebola Turned Routine Care Into a Life-threatening Event
May 28th 2015Dr. Diallo Thierno Souleymane, a doctor in Conakry, Guinea, recalls the day he received a phone call that changed his life. He had tested positive for Ebola. After surviving the disease and emerging from the Ebola treatment center, Souleymane was frightened to return to work and feared being stigmatized. He has since returned and advises other survivors to "have the courage to return to work and support the Ebola response."
Cooperation Among Viral Variants Helps Hepatitis C Survive Immune System Attacks
May 27th 2015Warring armies use a variety of tactics as they struggle to gain the upper hand. Among their tricks is to attack with a decoy force that occupies the defenders while an unseen force launches a separate attack that the defenders fail to notice. A study published earlier this month in the journal Proceedings of the National Academy of Sciences suggests that the hepatitis C virus (HCV) may employ similar tactics to distract the body's natural defenses. After infecting patients, hepatitis C evolves many variants, among them an "altruistic" group of viral particles that appears to sacrifice itself to protect other mutants from the body's immune system.
Ebola in Liberia: Frightened Patients Infected Their Caregivers
May 27th 2015Barbara Bono began working at Elwa hospital in Monrovia, Liberia just as word began to spread about Ebola. Although staff did their best to learn about the new disease and how to protect themselves, reality was very different from the theory. One by one staff fell sick but Bono continued to come to work, until she, too was infected with Ebola while caring for a man who denied his symptoms for fear of being sent to an Ebola treatment unit.
The Last Ebola Survivor of His Team Tells His Tale
May 27th 2015Mohamed Sesay was once part of an eight-person team of laboratory technicians trained to test for Ebola virus. But as the outbreak exploded and more and more samples arrived, his team was overwhelmed. One by one his colleagues sickened and died. He too eventually fell ill but survived, and is the only member of his team left to tell the tale.