Tag: smallpox vaccination

Pandora Report 12.11.2015

by spopescu, posted in Pandora Report

If you’re in Boston and enjoying a Chipotle burrito bowl, you may want to put the fork down. As many as 80 cases of norovirus were reported in association with a Boston Chipotle. The norovirus surge occurs just months after the multi-state Chipotle-linked E. coli 026 outbreak. This week we’re discussing superbugs Star Wars style, the decline of infectious disease specialists, Ebola lab stories from the field, and much more. Fun history fact Friday: on December 7, 1941, Pearl Harbor was bombed and on December 10, 1901, the first Nobel Prizes were awarded in Stockholm, Sweden 

“Phantom Menace” Superbug?
In a lab far, far away… How could we resist a Star Wars reference to antibiotic resistance? A recent CDC MMWR reported a growing incidence of a particularly concerning antibiotic-resistant organism. Carbapenem-resistant Enterobacteriaceae (CRE) are continuing to raise concerns due to cases related to endoscopic retrograde cholangiopancreatography (ERCP) scopes. Since it’s discovery, global health experts (including the CDC) have been keeping a close eye on CRE transmission and cases. A variant of CRE, called OXA-48-type carbapenemase, was seen in Enterobacteriaceae in Turkey in 2001. 52 isolates of CRE producing OXA-48-like carbapenemases were found in 43 patients in the US from June 2010-August 2015. A study in 2012 first referenced OXA-48-like carbapenemases as the phantom menace. The concerning issue with this particular CRE strain, aside from its known-resistance, is the growing emergence in the US. The difficulty in treatment and extreme care for isolation precautions makes patient care challenging. Interestingly, for those patients who provided a travel history, the majority (66%) had traveled internationally within the year before specimen collection and 55% were actually hospitalized outside the US for at least one night. The US cases involved several clusters and were spread across 19 states. Even more worrying, the laboratory diagnosis is tricky as “most U.S. clinical laboratories that test for CRE organisms wouldn’t identify this particular type of bacteria because it’s not part of standard testing.” The increase in cases and ease of hospital transmission are just a few more reasons why antimicrobial stewardship is so vital. May the force be with you!

Ebola Surveillance & Lab Response SeminarIMG_4700
In case you missed GMU’s seminar on global health security on Monday, 12/7, here’s a recap! Speakers included Dr. Matthew Lim (Senior Policy Advisor for Global Health Security, HHS, fmr Civil-Military Liaison Officer to WHO), Jeanette Coffin (Section Manager, Biosurveillance Division, MRIGlobal), and Phil Davis (Associate Scientist with MRIGlobal). Ms. Coffin and Mr. Davis discussed the operations, supported by the Defense Threat Reduction Agency’s (DTRA) Cooperative Biological Engagement Program (CBEP). The mobile lab was launched in December 2014. With only six weeks to train, prepare staff, acquire equipment, deliver, assemble, and much more, it’s a pretty impressive feat that this team pulled off. Ms. Coffin and Mr. Davis discussed how they were able to reduce much of the travel delay and time lag for Ebola testing results. Using equipment to perform RNA extraction and PCR’s, lab technicians were working in tight quarters in Moyamba and Lakka, Sierra Leone. To date, the DTRA-CBEP mobile lab operations tested 7,242 samples for Ebola. While they discussed many of the strengths like flexibility, relationship with vendors, and self-containment, there were also several challenges. Difficulties ranged from inadequate power and internet, to road reliability, food/water safety, haggling, and security issues related to petty theft and missing supply containers. Sustainability was heavily discussed as their expected withdrawal is June 2016 and the team hopes to provide education for ongoing surveillance. Next, Dr. Matthew Lim spoke of the history and impact this outbreak had on global health security. He emphasized “how much this has overturned the paradigm we have about health and security”. Dr. Lim’s discussion was fascinating in that he speaks from experience at both the WHO and HHS, pointing to the role of member states and how WHO funding cutbacks impacted outbreak response. He noted that the Global Health Security Agenda heavily emphasizes partnership of it’s 50 state members, NGO’s, and within the 11 action packages. He explained that global health affairs, in many ways, join foreign policy and health policy, highlighting the need for less siloing and more partnership to help encourage capacity measures. Overall, the standing-room-only seminar touched on both the operational struggles and the overarching role of global health security in both the Ebola outbreak, but also future preparedness efforts.

Daesh and Chem/Bioweapons?
The UK and France have moved to call ISIS, “Daesh”, to remove the association with Islam. Given Daesh’s use of mustard gas, is bioterrorism a stretch? Sandra Maksimovic-Sara of Outbreak News Today discusses their attempts to obtain biological and chemical weapons as a means of using non-conventional weapons to change their modus operandi. While she doesn’t mention tacit knowledge, Maksimovic-Sara notes that “for a biological and chemical terrorist attack, there must be some know-how and background and a professional approach, which is so far away from impatient aggressive Islamic terrorists gathered in Daesh. They want fast track acts and fast track results.” While preparedness efforts must account for a variety of attacks, it’s vital to remember technical limitations. As Dr. Sonia Ben Ouagrham-Gormley noted, tacit knowledge is a significant hurdle for non-state actors to overcome in their quest for bioweapons.

To Quarantine or Not To Quarantine? 
The fallout of the 2014 West Africa Ebola outbreak is still ongoing and while many US hospitals feel they are better prepared to handle cases, there are many that experienced negative treatment related to preparedness efforts. There have been several returned travelers from the affected countries that were put into quarantine upon arrival in their home country. While many were involved in patient care, there are several that had no interaction with patients and experienced what many would call, “fearbola“. While quarantine efforts are important for those that may have had patient interaction, risk assessments are vital. Sheri Fink of The New York Times notes that several states “have the legal authority to impose quarantines, often exceeded those guidelines, restricting the movements of returning health workers and others.” Many who were quarantined experienced public harassment, media scrutiny, and some have filed lawsuits for civil rights violations.

France’s Bioterrorism Preparedness
Given the November terrorist attacks in Paris, it’s not surprising that France is looking to ramp up their biodefense efforts. Following the arrival of a third generation vaccine, France has decided to revise its smallpox preparedness and response plans. Last revisited in 2006, the plan is to vaccinate first responders and healthcare professionals that are most likely to identify and care for smallpox cases. Smallpox has long been an organism of concern for bioweapon applications. In coordination with the Secrétariat Général de la Défense et la Security Nationale, (SGDSN- General Secretariat for Defense and National Security) these plans will include the new vaccine, Imvanex, that was developed by the Danish biotech company, Bavarian Nordic, “on behalf of the US under Bioshield”. While the new plan involves “circles” of people, the new transgenic vaccine has vastly decreased the side effects that were commonly associated with first and second generational variola vaccines. In the past, smallpox vaccines were associated with high volumes of side effects, which was a roadblock to previous mass-vaccination efforts as a biodefense strategy. France has several biopreparedness strategies that include a syndromic surveillance program, SurSaUD, a White Plan, and many other efforts to prevent, identify, and respond to health security threats. The updated French plans hope to “frustrate and deter terrorists” as well as respond to concerns of re-emerging infectious diseases. Elisande Nexon presents an overview of France’s biopreparedness efforts and the public health threats they may encounter. While the November attacks in Paris will most likely initiate additional changes to France’s biopreparedness, their existing methods are extensive and reveal national support for biodefense.

Stories You May Have Missed:

  • Infectious Disease Specialists on the Decline – The National Resident Matching Program (responsible for matching medical students with specialty training programs) announced that of the 335 infectious disease fellowship positions available, only 218 were filled. This is especially concerning as it follows several years of low matching for infectious disease positions. The Infectious Disease Society of America has even begun brainstorming recruiting tactics for what many consider a “thinking specialty” that may not have the glamor or pay that draws students into the field. Speaking from experience as an infection preventionist, the infectious disease physicians I have worked with were by far the most dedicated, intelligent, and passionate people. I think we can all safely agree that the world needs more infectious disease specialists, especially following outbreaks like those of Ebola and Zika virus.
  • USAMRIID Supported Study Traces Ebola Outbreak – a recent study lead by USAMRIID found that a majority of the Liberian Ebola cases “can be traced back to a form of the virus transmitted from Sierra Leone”. The sequencing of hundreds of isolates also supports the role of high-density neighborhoods as an accelerant for the outbreak. Interestingly, researchers found that the Ebola strain diversified in Liberia prior to being transmitted to cases in Guinea and Mali.
  • Yamuna River Harbors High Volume of Antibiotic-Resistant Organisms – Researchers found that the Yamuna river in Dehli, India, had an alarmingly high amount of resistant organisms. There were large quantities of several organisms found that showed resistance to many common antibiotics like ampicillin, streptomycin, etc.
  • MERS Was the Most 2015 Googled Word in Korea – also considered Korea’s “hottest” Twitter issue, MERS became the most searched topic after the first patient was confirmed on May 20th.

Pandora Report 8.31.14

by juliadhomstad, posted in Pandora Report

Fall classes at George Mason have already started and this Labor Day weekend marks the official end of summer. This week, we have stories covering a wide range of topics—an Ebola update (of course), a fascinating article on vaccinia infections acquired through shaving, Haj precautions, and the ISIS “laptop of doom.”

Best wishes for a safe and enjoyable holiday!

Ebola Virus Outbreak Could Hit 20,000 Within Nine Months, Warns WHO

There were many stories this week covering the continuing Ebola outbreak in West Africa. Senegal saw its first (imported) case of the virus this week and has banned flights to and from the affected countries while shutting its land border with Guinea and Nigeria saw its first death outside of the capital city of Lagos. In the Democratic Republic of Congo, where Ebola first emerged in 1976, there have been reported cases of a hemorrhagic gastroenteritis similar to Ebola. I read conflicting accounts this week of the “patient zero” for the Ebola outbreak—a young boy or an older traditional healer. There were reports of some U.S. universities screening students from West Africa for Ebola. There was coverage of a Toronto medical isolation unit ready for patients and information about GlaxoSmithKline’s experimental ebola vaccine which would be tested on humans in the next few weeks.

All of this news came among World Health Organization estimates that this West African outbreak could affect 20,000 people over the next nine months and that half a billion dollars would be needed to stop the spread of the disease.

The Wall Street Journal—“The WHO program will likely cost around $490 million and require contributions from national governments, some U.N. and non-governmental agencies, as well as humanitarian organizations, it said.”

First Reported Spread of Vaccinia Virus Through Shaving After Contact Transmission

This week, reports in the August issue of Medical Surveillance Monthly Report from the Armed Forces Health Surveillance Center covered vaccinia virus infection—the virus used for smallpox vaccinations—within the U.S. Air Force. The infections in the report occurred in June 2014, and affected four individuals.

Infection Control Today—“Over the past decade, most cases of contact vaccinia (i.e., spread of the virus from a vaccinated person to an unvaccinated person) have been traced to U.S. service members, who comprise the largest segment of the population vaccinated against smallpox. Most involve women or children who live in the same household and/or share a bed with a vaccinee or with a vaccinee’s contact. Of adult female cases, most are described as spouses or intimate partners of vaccinees or secondary contacts. Of adult male cases, most involve some type of recreational activity with physical contact, such as wrestling, grappling, sparring, football, or basketball. Household interactions (e.g., sharing towels or clothing) and “unspecified contact” are also implicated.”

Government to Keep Haj Infection-Free 

This week, the Saudi Arabian Ministry of Health announced mandatory measures for Haj and Umrah pilgrims coming from countries with active outbreaks or high rates of infectious diseases. The Health Ministry sent information to embassies outlining health requirements for those seeking pilgrim visas.

Arab News—“‘Although we do not issue Haj visas for pilgrims coming from endemic countries, we will still be monitoring pilgrims coming from other African countries for Ebola symptoms,’ said [Sami] Badawood [Jeddah Health Affairs director.]

He said the ministry would also focus on diseases such as yellow fever, meningitis, seasonal influenza, polio and food poisoning.”

Is the ISIS Laptop of Doom an Operational Threat?

Discovery of a laptop, which has been linked to ISIS, raises new questions about the organization’s plans relating to use of WMD—specifically chemical or biological weapons. Over 35,000 files on the laptop are being examined and has offered new insight into ISIS and their WMD aspirations.

Foreign Policy—“Most troubling is a document that discusses how to weaponize bubonic plague. But turning that knowledge into a working weapon requires particular expertise, and it’s not clear that the Islamic State has it.”

 

Image Credit: Wikimedia Commons

Reemergence of smallpox: A greater threat now than ever before

by juliadhomstad, posted in News

By Chris Healey

In the event of a resurgence of smallpox, treatment and containment would be exacerbated by illnesses and medical practices not present when the virus was eliminated.

Smallpox was one of the most significant diseases in human history. Although it was first distinguished from measles in China around 340 AD, evidence of the disease has been found on the remains of Egyptian mummies entombed over a thousand years earlier.

Smallpox is caused by Variola major, a virus in the Orthopoxvirus genus. The illness is known for causing characteristic pustules, severe symptoms and debilitating morbidity. Mortality rates exceeding 30% have been reported. The disease is almost always fatal in immunocompromised individuals.

Efforts to confer immunity against smallpox have been practiced for centuries. A technique called variolation, which involved inoculation with material from smallpox pustules, was used as far back as 1000 AD.

Due to the conserved nature of Orthopoxvirus, immunity to a wide range of viruses within the genus can be conferred after infection with a virus within the same genus. In 1796, Edward Jenner discovered inoculation with cowpox conferred immunity to smallpox. He called the technique vaccination, from the Latin vacca for cow. Vaccination results in less adverse effects and fatalities than variolation, making it the preferred method of conferring smallpox immunity.

Today, vaccinia virus is used in lieu of cowpox virus to confer immunity. Vaccinia virus creates a localized lesion that disappears over time in most individuals.

Persistent vaccination practices lead to the elimination of smallpox from most industrialized countries by the 1950s. In 1966, the World Health Assembly voted to fund an aggressive worldwide vaccination campaign to whittle away remaining pockets of the illness. After a successful campaign, the World Health Organization declared smallpox eradicated on December 9, 1979. The organization issued a recommendation for the cessation of smallpox vaccination in 1980.

Although smallpox is not a public health threat, it still exists. Stockpiles of the virus are maintained at the headquarters of the Centers for Disease Control in Atlanta and at a biotechnology institute in Novosibirsk, Russia.

Reintroduction of smallpox to the population would be devastating. Several immunologically-naïve generations are present. Other than those who received smallpox vaccines through military or specialized research positions, the entire population is almost completely unprotected.

Immunocompromised individuals who receive a vaccine utilizing a virus capable of self-replication, also known as a replication-competent vaccine, have a risk of developing a condition called progressive vaccinia. It is an extremely debilitating condition with no cure and a 90% fatality rate.

Dryvax, the vaccine used to eliminate smallpox, was replication-competent. Progressive vaccinia was reported as a rare adverse reaction when smallpox vaccines were administered during eradication efforts. Although Dryvax is no longer used, another replication-competent vaccine, ACAM2000, has taken its place. If ACAM2000 is administered to the general population today, far more cases of progressive vaccinia are expected to occur.

HIV and immunosuppression drugs are two modern factors contributing to decreased immune function. The World Health Organization estimates 35.3 million people in the world are living with HIV—1.1 million of those in the United States. Immune suppression associated with the illness would make smallpox vaccination undesirable, and smallpox infection fatal. HIV was not a factor during eradication efforts. Individuals with HIV would be at great risk in the event of smallpox reemergence.

Many modern drugs dampen the immune system to alleviate a range of conditions and symptoms, from hay fever and asthma to anti-rejection drugs for transplant recipients. Immunosuppression drugs have become commonplace. Those drugs did not play a significant role during eradication efforts because they were very expensive and uncommon. In the event of a re-emergence, smallpox would likely exploit those taking immunosuppression drugs. Furthermore, immunosuppression drugs dramatically increase the chance of developing progressive vaccinia following smallpox vaccine administration.

There is, however, a vaccine alternative for immunocompromised individuals. Imvamune is a replication-incompetent vaccine produced by Bavarian Nordic. Replication-incompetent vaccines deliver a virus incapable of replication, meaning it cannot cause progressive vaccinia. Unfortunately, there is no way to test the vaccine’s ability to confer smallpox immunity. Replication-incompetent vaccines are generally considered by health experts to be less effective at conferring immunity than replication-competent alternatives.

It is for these reasons that the re-emergence of smallpox would deal a catastrophic blow to the wellbeing of individuals around the world and therefore every effort must be made to prevent the return of smallpox.