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Role of oral rehydration therapy in controlling epidemic of cholera and watery diarrhoea.

Oral rehydration therapy (ORT) is basically oral administration of liquid containing various electrolytes in specific proportions to prevent and treat dehydration. This treatment facilitates safe and optimal absorption of water and essential electrolytes such as sodium chloride, sodium bicarbonate and potassium chloride in dehydrated patients. Successful ORT was experienced in cholera patients in Kolkata and Dhaka which was followed by the development of oral rehydration salt (ORS). This procedure can be safely implemented at home. ORT reduced mortality rate both in cholera and non-cholera watery diarrhoea. The various health authorities must support preparedness before pre-positioning of adequate stocks of ORS packets for emergency situations. Health workers should have been the knowledge to prepare ORS solutions.

Cholera↗

Recognition of illness associated with covert chemical releases.

Public health threats from intentional releases of chemicals into the environment (ie, chemical terrorism) are an increasing concern in the United States. Recent situations of deliberate contamination of food and beverages with chemicals highlight the need for health care providers and public health officials to be alert for adult and pediatric patients in their communities who have signs and symptoms consistent with chemical exposures. In an effort to increase knowledge of surveillance and preparedness for illness related to potential chemical releases, we provide guidance to health care providers and public health personnel for recognizing illnesses or patterns of illnesses that might be associated with the intentional, covert release of chemical agents. In this article, we will discuss 5 examples of outbreaks of illnesses after a covert chemical release, obstacles to recognition of these illnesses, clues (ie, epidemiological patterns and syndromic presentations) that might enhance the recognition of illnesses from a covert chemical release, and public health strategies to enhance the rapid identification of a chemical terrorism event.

Chemical Terrorism↗

Bioterrorism: What? Why? and Who?

The former Secretary of the Department of Health and Human Services, Donna Shalala, indicated in an address in 1999 that complacency needs to be replaced with a sense of urgency in order for us to deal successfully with the threats of bioterrorism. The attack on September 11, 2001 and the anthrax threats have made our vulnerability clear. We are now living in a new and frightening world. Our complacency is gone. The victims and the survivors shall remain forever in our minds. Dr. Jeffery Koplan, Director, Centers for Disease Control and Prevention in his broadcast, Building Infrastruture to Protect the Public Health said we must look at preparedness in a new way. We need to: build a solid public health infrastructure with grant monies; rapidly address the problem of inadequately trained staff; and address the capacity of a laboratory to produce timely and accurate results for the diagnosis of agents in the investigation of outbreaks. We must take action to prepare the healthcare system to rapidly meet any challenge, overt or covert, that may emerge.

Bioterrorism↗

Infection control practices for SARS in Lao People's Democratic Republic, Taiwan, and Thailand: experience from mobile SARS containment teams, 2003.

BACKGROUND: Despite available recommendations on infection control for severe acute respiratory syndrome (SARS), information is limited on actual practices in Asian hospitals during the epidemic. We describe practices observed by mobile SARS containment teams (mobile teams) during outbreak investigations. METHODS: We retrospectively summarized infection control practices observed in hospitals visited by mobile teams in the Lao People's Democratic Republic (PDR), Taiwan, and Thailand, during March and April 2003. RESULTS: Mobile teams investigated 22 reports of SARS in 20 hospitals (1, 5, and 14 hospitals in Lao PDR, Taiwan, and Thailand, respectively). Facilities ranged from urban hospitals with negative-pressure isolation rooms and high-efficiency particulate air filtration to rural hospitals with patient rooms open to outside air circulation and intermittent running water. At the time of mobile team visits, 5 (25%) hospitals implemented infection control practices consistent with World Health Organization recommendations on visitor policies, private negative-pressure rooms, and personal protective equipment. CONCLUSIONS: Early in the SARS epidemic, mobile teams found wide variations in infection control practices and resources among Asian hospitals evaluating patients for SARS, indicating the importance of ongoing assessment during SARS preparedness. Mobile teams are one mechanism to assess practices and promote implementation of recommended infection control measures.

Communicable Disease Control↗

Highland fringe malaria and challenges in its control: the lesson from Akaki town.

Malaria is a major public health problem and of considerable socio-economic burden in most parts of Ethiopia. The country has witnessed recurrent epidemics of the disease, resulting in grave consequences including in areas designated as highland fringe. A study was undertaken to grossly assess the magnitude of the problems, the effectiveness of the control options and to explore the challenges encountered and the experiences gained during the 1998 malaria epidemic in Akaki Town and its environs. Health facility clinical records of individual patients and weekly surveillance and epidemic control reports were utilized as principal sources of data. The information revealed that the epidemic was very alarming affecting a sizable part of Akaki and the surrounding areas, with the total number of cases amounting to 622. The epidemic was controlled by case detection and treatment as well as by intensive vector control activities. The control endeavor, however, posed great difficulties due to the absence of systematic malaria control program, owing to underestimation of the threat from highland malaria. The contribution from the adjacent Oromia Malaria Control Program and The Federal Ministry of Health to control the epidemic (mainly vector control) was reckoned to be substantial. Thus, capacity building targeted to early detection, prevention and control of malaria epidemics, and preparedness is deemed to be of paramount importance. A viable Integrated Disease Surveillance and Response at health facilities could ensure early containment of the otherwise devastating epidemics.

Disease Outbreaks↗

Empirical evidence for the effect of airline travel on inter-regional influenza spread in the United States.

BACKGROUND: The influence of air travel on influenza spread has been the subject of numerous investigations using simulation, but very little empirical evidence has been provided. Understanding the role of airline travel in large-scale influenza spread is especially important given the mounting threat of an influenza pandemic. Several recent simulation studies have concluded that air travel restrictions may not have a significant impact on the course of a pandemic. Here, we assess, with empirical data, the role of airline volume on the yearly inter-regional spread of influenza in the United States. METHODS AND FINDINGS: We measured rate of inter-regional spread and timing of influenza in the United States for nine seasons, from 1996 to 2005 using weekly influenza and pneumonia mortality from the Centers for Disease Control and Prevention. Seasonality was characterized by band-pass filtering. We found that domestic airline travel volume in November (mostly surrounding the Thanksgiving holiday) predicts the rate of influenza spread (r(2) = 0.60; p = 0.014). We also found that international airline travel influences the timing of influenza mortality (r(2) = 0.59; p = 0.016). The flight ban in the US after the terrorist attack on September 11, 2001, and the subsequent depression of the air travel market, provided a natural experiment for the evaluation of flight restrictions; the decrease in air travel was associated with a delayed and prolonged influenza season. CONCLUSIONS: We provide the first empirical evidence for the role of airline travel in long-range dissemination of influenza. Our results suggest an important influence of international air travel on the timing of influenza introduction, as well as an influence of domestic air travel on the rate of inter-regional influenza spread in the US. Pandemic preparedness strategies should account for a possible benefit of airline travel restrictions on influenza spread.

Aircraft↗

[The Canadian experience with the SARS outbreak--Israeli lessons to be learned].

The SARS epidemic raised tremendous challenges for the Canadian health system, challenges for which the country was not adequately prepared. Due to the serious consequences of this outbreak in terms of lives lost, medical, social and economical losses, the Canadian government has ordered the formation of a national commission to conduct a comprehensive and impartial investigation of these events. In addition, the Canadian Minister of Health has established the National Advisory Committee on SARS and Public Health with a mandate to "provide an assessment of current public health efforts and lessons learned for ongoing and future infectious disease control". Over a period of several months, these committees have thoroughly investigated all aspects of the events, which have led to this inadequate preparedness. In this article, we summarize the committee's conclusions, which are of direct relevance for the Israeli health care system. Hopefully, these important short and long term lessons, learnt by the Canadian at such a high cost, may be implemented locally, thus enabling better control and prevention of similar future threats caused by emerging and re-emerging infectious diseases.

Canada↗

Impact of a viral respiratory epidemic on the practice of medicine and rehabilitation: severe acute respiratory syndrome.

Severe acute respiratory syndrome (SARS) is a new respiratory viral epidemic that originated in China but has affected many parts of the world, with devastating impact on economies and the practice of medicine and rehabilitation. A novel coronavirus has been implicated, with transmission through respiratory droplets. Rehabilitation was significantly affected by SARS, because strict infection control measures run counter to principles such as multidisciplinary interactions, patients encouraging and learning from each other, and close physical contact during therapy. Immunocompromised patients who may silently carry SARS are common in rehabilitation and include those with renal failure, diabetes, and cancer. Routine procedures such as management of feces and respiratory secretions (eg, airway suctioning, tracheotomy care) have been classified as high risk. Personal protection equipment presented not only a physical but also a psychologic barrier to therapeutic human contact. Visitor restriction to decrease chances of disease transmission are particularly difficult for long-staying rehabilitation patients. At the height of the epidemic, curtailment of patient movement stopped all transfers for rehabilitation, and physiatrists had to function as general internists. Our experiences strongly suggest that rehabilitation institutions should have emergency preparedness plans because such epidemics may recur, whether as a result of nature or of bioterrorism.

Communicable Diseases, Emerging↗

The medical threat of biological weapons.

There is a heightened threat of biological weapons being used for biological warfare or bioterrorism. Many of the microorganisms and toxins that may be used as such biological weapons can easily be acquired and mass produced. Dissemination of aerosols of these biological agents can produce mass casualties. If used by a terrorist they may overwhelm our current public health system. Some biological agents, such as Bacillus anthracis (anthrax) and botulinum toxin, are considered far more likely than others to be used as biological weapons; smallpox virus was apparently produced in mass quantities by the former Soviet Union and may also be a serious threat. The release of such agents could go undetected for several hours or days and would be followed by mass illnesses and a first line of response by the public health community. Rapid epidemiological investigation to identify the nature of the disease outbreak would be critical for limiting casualties. For many, but not all, biological agents there are medical treatments that can greatly lower the mortality rate. There currently are, however, insufficient supplies of medicinals and trained personnel to cope with a massive bioterrorist or biological warfare use of biological weapons. Increasing our preparedness is critical.

Bacterial Infections↗

Influenza pandemic preparedness action plan for the United States: 2002 update.

Preparation for the next influenza pandemic includes development of a national plan that has 3 goals: to limit the burden of disease, to minimize social disruption, and to reduce economic losses attributable to the pandemic. Priority areas to be addressed and improved in the plan to achieve these goals include global and national influenza surveillance, vaccine development and production, vaccine use and coverage, chemoprophylaxis and therapy, guidelines for clinical care and health resources management, emergency preparedness, and research. This multifaceted plan will require close collaboration between public and private sectors to ameliorate the potentially devastating impact of pandemic influenza.

Disease Outbreaks↗

Taking care of the sick and scared: a local response in pandemic preparedness.

Virtually all health care operations, including public health, are undertaken only at a local or regional level. Large-scale infectious disease emergencies, such as SARS or pandemic influenza, will be recognized and managed at a local level. The creation of the Public Health Agency of Canada (PHAC) was an important step in strengthening public health capacity. However, we need adequate operational capacity in local public health departments to have a strong public health system. Local public health takes an integral role in the preparation for and management of infectious disease emergencies. Local public health departments and regional public health infrastructures must be positioned to both maintain core functions and to lead and support health sector response to emergencies. The local establishment of a flexible and sustainable emergency management system must address the need to: integrate health care and first responders; provide all-hazards tools for managing a crisis at the frontline; rank service priorities and provide surge resources; and provide accurate information on a timely basis. Only the leaders within the local or regional health care facilities and organizations can develop workable plans to deliver health care. PHAC must ensure and support the local public health infrastructure and local emergency preparedness. Without this support, there will be consequences for local response to major public health emergencies.

Canada↗

Pandemic unpreparedness?

Analysis of national influenza pandemic preparedness plans reveals that the preparations for an effective response in the early stages of a pandemic, while a vaccine is still being prepared, are giving cause for concern.

Antiviral Agents↗

On the front lines: family physicians' preparedness for bioterrorism.

OBJECTIVE: The events of September 11, 2001, and the nation's recent experience with anthrax assaults made bioterrorism preparedness a national priority. Because primary care physicians are among the sentinel responders to bioterrorist attacks, we sought to determine family physicians' beliefs about their preparedness for such an attack. STUDY DESIGN: In October 2001 we conducted a national survey of 976 family physicians randomly selected from the American Academy of Family Physicians' active membership directory. POPULATION: 614 (63%) family physicians responded to the survey. OUTCOMES MEASURED: Physicians' self-reported ability to "know what to do as a doctor in the event of a suspected bioterrorist attack, recognize signs and symptoms of an illness due to bioterrorism, and know where to call to report a suspected bioterrorist attack." RESULTS: Ninety-five percent of physicians agreed that a bioterrorist attack is a real threat within the United States. However, only 27% of family physicians believed that the US health care system could respond effectively to a bioterrorist attack; fewer (17%) thought that their local medical communities could respond effectively. Twenty-six percent of physicians reported that they would know what to do as a doctor in the event of a bioterrorist attack. Only 18% had previous training in bioterrorism preparedness. In a multivariate analysis, physicians reported that preparedness for a bioterrorist attack was significantly associated with previous bioterrorism preparedness training (OR 3.9 [95% CI 2.4-6.3]) and knowing how to obtain information in the event of a bioterrorist attack (OR 6.4 [95% CI 3.9-10.6]). CONCLUSIONS: Only one quarter of family physicians felt prepared to respond to a bioterrorist event. However, training in bioterrorism preparedness was significantly associated with physicians' perceived ability to respond effectively to an attack. Primary care physicians need more training in bioterrorism preparedness and easy access to public health and medical information in the event of a bioterrorist attack.

Adult↗

The threat and prospects for control of an influenza pandemic.

Influenza constitutes the most widespread and significant respiratory infectious disease in the world, resulting in increased morbidity, mortality and economic loss each epidemic year. Pandemic influenza is a worldwide epidemic usually caused by a new virus variant to which the majority of the population has no immunity. As demonstrated in the devastating pandemic of 1918 to 1919, a pandemic virus may infect 30 to 50% of the worlds population and kill 1 to 2% of those infected. Pandemic control must be a concerted and co-ordinated world strategy and under the auspices of the World Health Organization, pandemic preparedness plans have been formulated, including: intensified surveillance for more rapid identification of new reassortant viruses with potential human virulence and infectivity, laboratory characterization of the new viruses so that vaccine may be prepared, development of techniques for more rapid vaccine production and the manufacture and stock piling of antiviral drugs. The H5N1 outbreak of virulent chicken influenza in 1997 in Hong Kong which resulted in the deaths of six of 18 infected persons serves as a wake-up call. Should such a virus attain high transmissibility in humans, a pandemic of tragic proportions might ensue. Even though the timing of onset of the next pandemic cannot be precisely predicted, world governments must understand the urgency of the problem and increase funding for influenza pandemic control.

Adjuvants, Immunologic↗

Ready and willing? Physicians' sense of preparedness for bioterrorism.

Little is known about contemporary physicians' sense of preparedness for bioterrorism, willingness to treat patients despite personal risk, or belief in the professional duty to treat during epidemics. In a recent national survey few physicians reported that they or their practice are "well prepared" for bioterrorism. Still, most respondents reported that they would continue to care for patients in the event of an outbreak of "an unknown but potentially deadly illness," although only a narrow majority reported believing in a professional duty to treat patients in epidemics. Preparing physicians for bioterrorism should entail providing practical knowledge, preventive steps to minimize risk, and reinforcement of the profession's ethical duty to treat.

Adult↗

Bioterrorism: Preparing for the impossible or the improbable.

OBJECTIVE: To review the current literature surrounding the history of bioterrorism, the relative risk of a bioterrorist attack, methods of surveillance for biological agents, identification and management of various biological agent casualties, as well as the role of the intensivist in managing a bioterrorist attack. METHODS: Internet and Medline search (from 1966 to 2004) for articles relating to bioterrorism, biological agents, biological warfare, hospital preparedness, disaster management, and intensive care. CONCLUSIONS: There are few instances of a successful large-scale biological weapons attack in history. Weaponization of biological agents for aerosol dispersal is difficult and has often proved to be the rate-limiting step for a successful attack. Although a successful biological attack is currently unlikely, it is still feasible. More importantly, the threat of one is likely to cause much panic in the public, while a successful attack would overburden the current healthcare infrastructure. Intensivists will need to have specific knowledge of identifying and managing casualties from various biological agents. In addition, they will need to play an integral part in the preparedness of their institutions and communities for managing a bioterrorist event.

Biological Warfare↗

A plague on your city: observations from TOPOFF.

The United States Congress directed the Department of Justice to conduct an exercise engaging key personnel in the management of mock chemical, biological, or cyberterrorist attacks. The resulting exercise was called "TOPOFF," named for its engagement of top officials of the United States government. This article offers a number of medical and public health observations and lessons discovered during the bioterrorism component of the exercise. The TOPOFF exercise illuminated problematic issues of leadership and decision-making; the difficulties of prioritization and distribution of scarce resources; the crisis that contagious epidemics would cause in health care facilities; and the critical need to formulate sound principles of disease containment. These lessons should provoke consideration of future directions for bioterrorism planning and preparedness at all levels of government and among the many communities and practitioners with responsibilities for national security and public health.

Bioterrorism↗

Severe acute respiratory syndrome surveillance in Australia.

In March 2003, the World Health Organization (WHO) issued a global alert recommending active worldwide surveillance for severe acute respiratory syndrome (SARS). This paper describes the epidemiological features of cases reported by Australian states and territories to the Australian Government Department of Health and Ageing between 17 March and 31 July 2003. There were 138 people investigated for SARS: 111 as suspect and 27 as probable. Five probable cases were reported to WHO after review of other possible diagnoses and Australia-specific exclusion criteria had been applied. An additional probable case identified by laboratory testing overseas, but who was not under investigation when in Australia, was also reported to WHO. The method by which surveillance for SARS was rapidly established provided an opportunity to examine Australia's planning and preparedness for future respiratory disease epidemics such as influenza.

Adolescent↗