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emerging and reemerging diseases

Anne Straily, Naomi Drexler, Denica Cruz-Loustaunau, Christopher D Paddock, Gerardo Alvarez-Hernandez
Rocky Mountain spotted fever (RMSF), a life-threatening tickborne zoonosis caused by Rickettsia rickettsii, is a reemerging disease in Mexico (1,2). R. rickettsii is an intracellular bacterium that infects vascular endothelium and can cause multisystem organ failure and death in the absence of timely administration of a tetracycline-class antibiotic, typically doxycycline. Epidemic RMSF, as described in parts of Arizona and Mexico, is associated with massive local infestations of the brown dog tick (Rhiphicephalus sanguineus sensu lato) on domestic dogs and in peridomestic settings that result in high rates of human exposure; for example, during 2003-2012, in Arizona the incidence of RMSF in the three most highly affected communities was 150 times the U...
November 25, 2016: MMWR. Morbidity and Mortality Weekly Report
Doris Cardona, María Osley Garzón, Mateo Calle, Maite Catalina Agudelo, Ángela Segura
Whooping cough is a public health problem that mainly affects children under one year of age with highly lethal outcomes. It is a re-emerging disease, which is preventable by immunization. Objective: To analyze mortality and morbidity trends of whooping cough in Colombia between 2002 and 2012. Materials and methods: We conducted a quantitative descriptive study of deaths by pertussis between 2002 and 2012 using data from death certificates registered by the Departamento Administrativo Nacional de Estadística, and cases reported to the Sistema Nacional de Vigilancia en Salud Pública, 2005-2012...
September 1, 2016: Biomédica: Revista del Instituto Nacional de Salud
Glady Hazitha Samuel, Zach N Adelman, Kevin M Myles
The transmissibility of vector borne viruses can be affected by a combination of factors, both extrinsic (climatic changes, temperature, urbanization, among others) and intrinsic (genetics, life span, immunity, among others). Temperature is of particular importance since the insect vectors of arthropod-borne viruses (arboviruses) are ectothermic and acutely susceptible to temperature changes. Modeling suggests that with increasing global temperature and urbanization, arboviral diseases will continue to emerge or reemerge...
August 2016: Current Opinion in Insect Science
Christina Chung, Leah S Fischer, Angelica OʼConnor, Alvin Shultz
CONTEXT: CDC's Epidemiology and Laboratory Capacity for Infectious Diseases (ELC) Cooperative Agreement aims to help health departments strengthen core epidemiology capacity needed to respond to a variety of emerging infectious diseases. In fiscal year 2014, $6 million was awarded to 41 health departments for flexible epidemiologists (FEs). FEs were intended to help meet health departments' unique needs and support unanticipated events that could require the diversion of resources to specific emerging or reemerging diseases...
September 2, 2016: Journal of Public Health Management and Practice: JPHMP
Monique R Anderson, Fatah Kashanchi, Steven Jacobson
Viruses have evolved many mechanisms by which to evade and subvert the immune system to ensure survival and persistence. However, for each method undertaken by the immune system for pathogen removal, there is a counteracting mechanism utilized by pathogens. The new and emerging role of microvesicles in immune intercellular communication and function is no different. Viruses across many different families have evolved to insert viral components in exosomes, a subtype of microvesicle, with many varying downstream effects...
July 2016: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
Pravas Ranjan Sahoo, Kamadev Sethy, Swagat Mohapatra, Debasis Panda
India being a developing country mainly depends on livestock sector for its economy. However, nowadays, there is emergence and reemergence of more transboundary animal diseases. The existing diagnostic techniques are not so quick and with less specificity. To reduce the economy loss, there should be a development of rapid, reliable, robust diagnostic technique, which can work with high degree of sensitivity and specificity. Loop mediated isothermal amplification assay is a rapid gene amplification technique that amplifies nucleic acid under an isothermal condition with a set of designed primers spanning eight distinct sequences of the target...
May 2016: Veterinary World
Romina Croci, Elisabetta Bottaro, Kitti Wing Ki Chan, Satoru Watanabe, Margherita Pezzullo, Eloise Mastrangelo, Claudio Nastruzzi
RNA virus infections can lead to the onset of severe diseases such as fever with haemorrhage, multiorgan failure, and mortality. The emergence and reemergence of RNA viruses continue to pose a significant public health threat worldwide with particular attention to the increasing incidence of flaviviruses, among others Dengue, West Nile Virus, and Yellow Fever viruses. Development of new and potent antivirals is thus urgently needed. Ivermectin, an already known antihelminthic drug, has shown potent effects in vitro on Flavivirus helicase, with EC50 values in the subnanomolar range for Yellow Fever and submicromolar EC50 for Dengue Fever, Japanese encephalitis, and tick-borne encephalitis viruses...
2016: International Journal of Biomaterials
Tommy T-Y Lam, Huachen Zhu, Yi Guan, Edward C Holmes
The emergence and reemergence of rapidly evolving RNA viruses-particularly those responsible for respiratory diseases, such as influenza viruses and coronaviruses-pose a significant threat to global health, including the potential of major pandemics. Importantly, recent advances in high-throughput genome sequencing enable researchers to reveal the genomic diversity of these viral pathogens at much lower cost and with much greater precision than they could before. In particular, the genome sequence data generated allow inferences to be made on the molecular basis of viral emergence, evolution, and spread in human populations in real time...
August 31, 2016: Annual Review of Genomics and Human Genetics
Dana L Thomas, Gilberto A Santiago, Roman Abeyta, Steven Hinojosa, Brenda Torres-Velasquez, Jessica K Adam, Nicole Evert, Elba Caraballo, Elizabeth Hunsperger, Jorge L Muñoz-Jordán, Brian Smith, Alison Banicki, Kay M Tomashek, Linda Gaul, Tyler M Sharp
During a dengue epidemic in northern Mexico, enhanced surveillance identified 53 laboratory-positive cases in southern Texas; 26 (49%) patients acquired the infection locally, and 29 (55%) were hospitalized. Of 83 patient specimens that were initially IgM negative according to ELISA performed at a commercial laboratory, 14 (17%) were dengue virus positive by real-time reverse transcription PCR performed at the Centers for Disease Control and Prevention. Dengue virus types 1 and 3 were identified, and molecular phylogenetic analysis demonstrated close identity with viruses that had recently circulated in Mexico and Central America...
June 2016: Emerging Infectious Diseases
Adugna Abera, Geremew Tasew, Teshome Tsegaw, Asfaw Kejella, Abate Mulugeta, Dagimlidet Worku, Abraham Aseffa, Endalamaw Gadisa
Kala-azar is a growing public health problem in Ethiopia. Benishangul-Gumuz regional state was previously not known to be endemic for the disease. In response to a case report from the region, we conducted a rapid assessment survey. A pretested questionnaire was used to capture sociodemographic and clinical histories pertinent to kala-azar. Study participants with complaints of fever and headache for 2 weeks or more were tested for kala-azar and malaria. All participants were screened with the leishmanin skin test and the direct agglutination test for exposure to Leishmania, defined as a positive result with either or both tests...
July 6, 2016: American Journal of Tropical Medicine and Hygiene
V M Cáceres, P Cardoso, S Sidibe, S Lambert, A Lopez, B Pedalino, D J Herrera Guibert
OBJECTIVE: Intensified surveillance will be vital in the elimination phase to verify Ebola-free status and mitigate potential reemergence of the disease in West Africa. Zero-reporting from high-risk districts is a key strategy for surveillance. Our objective was to implement a pilot investigation to assess the feasibility of using short message service (SMS) texting for daily reporting of Ebola cases under investigation (CUI) in Guinea-Bissau in the context of an ongoing emergency-response training program known as Surveillance Training for Ebola Preparedness (STEP)...
September 2016: Public Health
Emmanuel Chanda, Edward K Thomsen, Mulenga Musapa, Mulakwa Kamuliwo, William G Brogdon, Douglas E Norris, Freddie Masaninga, Robert Wirtz, Chadwick H Sikaala, Mbanga Muleba, Allen Craig, John M Govere, Hilary Ranson, Janet Hemingway, Aklilu Seyoum, Michael B Macdonald, Michael Coleman
Arthropod vectors transmit organisms that cause many emerging and reemerging diseases, and their control is reliant mainly on the use of chemical insecticides. Only a few classes of insecticides are available for public health use, and the increased spread of insecticide resistance is a major threat to sustainable disease control. The primary strategy for mitigating the detrimental effects of insecticide resistance is the development of an insecticide resistance management plan. However, few examples exist to show how to implement such plans programmatically...
May 2016: Emerging Infectious Diseases
José Brites-Neto, Jardel Brasil, Keila Maria Roncato Duarte
AIM: The vulnerability of tropical developing countries to the emerging disease constitutes a critical phenomenon in which the invasion of wild niches by human hosts, contributes to expansion of zoonotic diseases, such as the Brazilian spotted fever (BSF). This study performed a diagnosis of species occurrence of their hosts (Hydrochoerus hydrochaeris) and vectors (Amblyomma sculptum and Amblyomma dubitatum) on the warning area for this reemerging disease in Brazil. MATERIALS AND METHODS: The study was conducted in a warning area for BSF in the city of Americana, São Paulo state...
September 2015: Veterinary World
Waqas Shuaib, Hashim Stanazai, Ahmad G Abazid, Ahmed A Mattar
Zika virus (ZKV) is an arbovirus of the Flaviviridae family, which includes West Nile, dengue fever, yellow fever, and Japanese encephalitis virus. It is transmitted by the Aedes genus of mosquitoes. Before 2015, ZKV outbreaks occurred in areas of Africa, the Pacific Islands, and Southeast Asia. The current large outbreak, which began in Brazil, has also emerged throughout a large part of South/Central America, a number of islands in the Caribbean, including Puerto Rico, the Virgin Islands, and Mexico. A sudden rise in the numbers of infants reported born with microcephaly in Brazil, and the detection of the single-stranded positive RNA virus in the amniotic fluid of affected newborns, has captured medical, mainstream media, and global political attention, causing considerable concern in a post-Ebola global community considerably more focused on the threat of internationally transmissible diseases...
August 2016: American Journal of Medicine
Nicholas H Carbonetti
PURPOSE OF REVIEW: The purpose of this review is to summarize and discuss recent findings and selected topics of interest in Bordetella pertussis virulence and pathogenesis and treatment of pertussis. It is not intended to cover issues on immune responses to B. pertussis infection or problems with currently used pertussis vaccines. RECENT FINDINGS: Studies on the activities of various B. pertussis virulence factors include the immunomodulatory activities of filamentous hemagglutinin, fimbriae, and adenylate cyclase toxin...
June 2016: Current Opinion in Infectious Diseases
Peng Zhou, Mary Tachedjian, James W Wynne, Victoria Boyd, Jie Cui, Ina Smith, Christopher Cowled, Justin H J Ng, Lawrence Mok, Wojtek P Michalski, Ian H Mendenhall, Gilda Tachedjian, Lin-Fa Wang, Michelle L Baker
Bats harbor many emerging and reemerging viruses, several of which are highly pathogenic in other mammals but cause no clinical signs of disease in bats. To determine the role of interferons (IFNs) in the ability of bats to coexist with viruses, we sequenced the type I IFN locus of the Australian black flying fox, Pteropus alecto, providing what is, to our knowledge, the first gene map of the IFN region of any bat species. Our results reveal a highly contracted type I IFN family consisting of only 10 IFNs, including three functional IFN-α loci...
March 8, 2016: Proceedings of the National Academy of Sciences of the United States of America
Teresia M Buza, Sherman W Jack, Halid Kirunda, Margaret L Khaitsa, Mark L Lawrence, Stephen Pruett, Daniel G Peterson
There is an urgent need for a unified resource that integrates trans-disciplinary annotations of emerging and reemerging animal infectious and zoonotic diseases. Such data integration will provide wonderful opportunity for epidemiologists, researchers and health policy makers to make data-driven decisions designed to improve animal health. Integrating emerging and reemerging animal infectious and zoonotic disease data from a large variety of sources into a unified open-access resource provides more plausible arguments to achieve better understanding of infectious and zoonotic diseases...
2015: Database: the Journal of Biological Databases and Curation
Bradley C Gill, Daniel A Shoskes
PURPOSE OF REVIEW: The review provides the infectious disease community with a urologic perspective on bacterial prostatitis. Specifically, the article briefly reviews the categorization of prostatitis by type and provides a distillation of new findings published on bacterial prostatitis over the past year. It also highlights key points from the established literature. RECENT FINDINGS: Cross-sectional prostate imaging is becoming more common and may lead to more incidental diagnoses of acute bacterial prostatitis...
February 2016: Current Opinion in Infectious Diseases
Georges C Benjamin
The last 14 years has taught us that that we are facing a new reality; a reality in which public health emergencies are a common occurrence. Today, we live in a world with dangerous people without state sponsorship who are an enormous threat to our safety; one where emerging and reemerging infectious diseases are waiting to break out; a world where the benefits of globalization in trade, transportation, and social media brings threats to our communities faster and with a greater risk than ever before. Even climate change has entered into the preparedness equation, bringing with it the forces of nature in the form of extreme weather and its complications...
December 2015: Disaster Medicine and Public Health Preparedness
Alexandra Mangili, Tine Vindenes, Mark Gendreau
Infectious diseases are still among the leading causes of death worldwide due to their persistence, emergence, and reemergence. As the recent Ebola virus disease and MERS-CoV outbreaks demonstrate, the modern epidemics and large-scale infectious outbreaks emerge and spread quickly. Air transportation is a major vehicle for the rapid spread and dissemination of communicable diseases, and there have been a number of reported outbreaks of serious airborne diseases aboard commercial flights including tuberculosis, severe acute respiratory syndrome, influenza, smallpox, and measles, to name a few...
October 2015: Microbiology Spectrum
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