Our weekly wrap-up of antimicrobial stewardship & antimicrobial resistance scans
C Diff DNA found on hospital surfaces during outbreak
Originally published by CIDRAP News on Oct 27.
In a study today in the American Journal of Infection Control, the authors found Clostridium difficile DNA on 71% of hospital surfaces during a C difficile outbreak, and on 28% of the surfaces 2 years after the outbreak ended.
The disease is easily spread in hospitals because its spores are resistant to most disinfectants. The bacteria can also live on inert surfaces and is one of the leading causes of diarrhea in elderly hospital patients.
From January through July 2009, a C difficile outbreak linked to a mortality rate of 11% occurred in a Costa Rican general hospital. Twenty-four surface samples were collected during the outbreak, with another 54 surface samples collected 2 years later. Overall, C difficile DNAwas detected in 40% of the 75 environmental samples, with a 2.5-fold increase during the outbreak.
About 67% of bedrails and walls were C difficile–positive during the outbreak.
"These results reinforce the relevance of strict hygiene procedures and cleaning measures in the control of C difficile infections in hospitals, even in the absence of outbreaks," the authors concluded.
Oct 27 Am J Infect Control study
Hospital ASP program reduces antibiotic use 17% in children
Originally published by CIDRAP News on Oct 26.
A new study in the Journal of the Pediatric Infectious Diseases Society showed that a low-cost antibiotic stewardship program (ASP) substantially reduced antibiotic use among pediatric hospital patients.
Previous studied have shown that 33% to 72% of pediatric patients admitted to a hospital receive antimicrobials, but approximately 50% of those are unnecessary. This study followed an ASP at Randall Children's Hospital (RCH) in Portland, Ore. RCH is a nonfreestanding hospital (90% of children in the United States are treated at nonfreestanding hospitals) with 165 tertiary-care beds, including 24 pediatric intensive care unit (ICU) beds and 46 neonatal ICU beds.
The ASP was launched in in April 2013 and consisted of two actions: Engaging physician groups for systematic improvement, and provide 72-hour prospective auditing and feedback to optimize appropriate antibiotic use. RHC had five physicians in a pediatric infectious disease group leading the ASP. The group educated other physicians and created a protocol for antibiotic prophylaxis in pediatric cardiac surgery.
The authors compared antibiotic use in the 1 year prior to ASP implementation with 2 years after. They found that antibiotic use was reduced by 16.8 %, and use of vancomycin decreased by 38%. Cost savings were estimated to be $67,000 per year over the 2-year post-intervention period.
"We found that with limited dedicated resources, a simple ASP can reduce antibiotic use substantially in a nonfreestanding children's hospital," the authors concluded.
Oct 21 J Pediatr Infect Dis Soc abstract
NDA submitted for new antibiotic for hospital-treated skin infections
Originally published by CIDRAP News on Oct 25.
Melinta Therapeutics yesterday submitted a New Drug Application (NDA) to the US Food and Drug for the approval of intravenous and oral Baxdela (delafloxacin), an antibiotic for the treatment of bacterial skin and skin structure infections.
Baxdela is an investigational anionic fluoroquinolone for hospital-treated skin infections that acts against a broad spectrum of bacteria, including methicillin-resistant Staphylococcus aureus (MRSA). The NDA is based on the results of two phase 3 studies in which the drug met the primary endpoint—non-inferiority to a combination regimen of vancomycin plus aztreonam in reducing lesion size within 48 to 72 hours—and was well tolerated. The most common side effects were mild diarrhea and nausea.
"Baxdela, if approved, represents a potentially attractive treatment option for the nearly 3 million patients hospitalized annually in the U.S. with serious skin infections," Melinta CEO Eugene Sum, MD, said in a press release. "These patients have a high rate of treatment failure, and frequently have underlying medical conditions that pose challenges to the choice of antibiotic."
Baxdela has been designated a Qualified Infectious Disease Product by the FDA, a designation that accelerates the approval process.
Oct 24 Melinta Therapeutics press release
FDA approves new C difficile drug
Originally published by CIDRAP News on Oct 24.
The US Food and Drug Administration (FDA) has approved a new drug for the treatment of C difficile infection (CDI), according to a news release its manufacturer, Merck.
The drug, Zinplava (bezlotoxumab), was approved Friday for the treatment of recurrent CDI in adults who are also receiving antibacterial drug therapy for CDI and are at high risk of CDI recurrence. Zinplava is a human clonal antibody that works by binding itself to a toxin produced by C difficile bacteria (toxin B) and neutralizing it. Merck says the drug should be available early next year.
Merck says the adverse reactions reported in association with the drug include heart failure (primarily in patients with underlying congestive heart failure), nausea, pyrexia, and headache. Patients with underlying congestive heart failure are advised to use the drug only when the benefit outweighs the risk. Zinplava should be used only in conjunction with antibacterial treatment for CDI.
CDI, which can cause mild-to-severe diarrhea, is one of the most common healthcare-associated infections. According to the Centers for Disease Control and Prevention, CDI was responsible for nearly half a million illnesses in the United States in 2011, and 29,000 patients died within 30 days of infection. Recurrent CDI tends to affect patients over the age of 65 who have compromised immune systems.
Oct 21 Merck press release
Journal supplement provides overview of antifungal stewardship
Originally published by CIDRAP News on Oct 24.
The Journal of Antimicrobial Chemotherapy has released a November supplement devoted to antifungal stewardship.
The supplement is an open-access compilation of information presented at the November 2015 meeting of the Continuing Antifungal Research and Education (CARE) program, which brought together infectious disease physicians, medical microbiologists, pharmacologists, and other experts to participate in a series of lectures and clinical case presentations on the challenges of managing invasive fungal diseases (IFDs).
Like antibiotic stewardship, antifungal stewardship aims to preserve the future effectiveness of antifungal agents and improve patient outcomes. While IFDs occur less frequently than infections caused by drug-resistant bacteria, the management of IFDs poses unique challenges, including high case-fatality rates and high drug costs. These challenges, plus the emerging threat of antifungal resistance, are the principle rationale behind antifungal stewardship.
The supplement assesses the current landscape for the treatment of IFDs such as candidiasis, aspergillosis, cryptococcosis, fusariosis, and mucormycosis; describes the different strategies for effective antifungal stewardship programs; and evaluates how such programs have been implemented in different clinical settings and in different regions of the world.
November J Antimicrob Chemother supplement