Dengue is the most important emerging disease among international travelers, with a 30-fold increase in incidence over the past 50 years worldwide. Like malaria, dengue is transmitted to humans by mosquitoes.
Most cases are mild. Symptoms include fever, rash, headache, pain behind the eyes, and muscle and joint pain. According to the WHO, dengue hemorrhagic fever (DHF) is characterized by fever, low platelet count, clinical evidence of leaking capillaries, and spontaneous bleeding or fragile blood vessels. The most serious cases can lead to shock and death. There is no cure for dengue infection, but management of the disease's effects can prevent the worst outcomes.
The study, conducted by Ole Wichmann, MD, MCTM, DTM&H, at the Robert Koch Institute in Berlin, Germany, and colleagues throughout Europe, collected data through the European Network on Surveillance of Imported Diseases at 14 sites in 8 European countries.
Out of more than 200 patients treated for dengue infection at these sites over two years, less than 1 percent fit all four criteria necessary to meet the WHO definition of DHF. However, 11 percent had at least one manifestation of severe dengue disease, and a total of 23 percent required hospitalization due to dengue-related symptoms.
"Dengue exists more as a continuous spectrum," Dr. Wichmann said. "Severe disease can be present in patients who do not fulfill all four DHF criteria."
"The term 'dengue hemorrhagic fever' puts undue emphasis on bleeding," he added, noting that plasma leakage and shock can occur without it. "Clinicians who mainly focus on bleeding...may miss the most important conditions that require hospitalization and treatment."
Their findings also showed that travelers who acquire a second dengue infection are more at risk for severe cases of dengue, although some patients had severe symptoms when infected during their first trip to a dengue-endemic country.
It is becoming more and more crucial that health care providers understand the clinical spectrum of dengue and its diagnosis. "Given the increase in business travel and other travel, and the global spread of dengue fever, these findings have important implications for the future burden of severe imported dengue infections," Wichmann said. "It will also be of great interest to business and leisure travelers, and expatriates, who have experienced one dengue infection and are concerned about this risk of returning to a dengue endemic area."
As a next step to their study Wichmann highlighted the need for more inquiry into a clinical definition of dengue. "In order to perform more uniform surveillance and research, including vaccine trials, studies are urgently needed to establish new and more robust definitions for severe dengue."
Steve Baragona | EurekAlert!
Using fragment-based approaches to discover new antibiotics
21.06.2018 | SLAS (Society for Laboratory Automation and Screening)
Scientists learn more about how gene linked to autism affects brain
19.06.2018 | Cincinnati Children's Hospital Medical Center
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
22.06.2018 | Materials Sciences
22.06.2018 | Earth Sciences
22.06.2018 | Life Sciences