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A pregnant woman experiences stomach pains and headaches; another woman experiences eye inflammation and joint stiffness. 32. 5. "The Purple Puzzle". December 10, 2007. ( 2007-12-10) An abnormality on the ultrasound alarms parents expecting a baby; a biology teacher has a series of strange symptoms. 33. 6.
Dengue fever is a mosquito-borne disease caused by dengue virus, prevalent in tropical and subtropical areas. It is frequently asymptomatic; if symptoms appear they typically begin 3 to 14 days after infection. These may include a high fever, headache, vomiting, muscle and joint pains, and a characteristic skin itching and skin rash.
Scrub typhus or bush typhus is a form of typhus caused by the intracellular parasite Orientia tsutsugamushi, a Gram-negative α-proteobacterium of family Rickettsiaceae first isolated and identified in 1930 in Japan. [ 2][ 3] Although the disease is similar in presentation to other forms of typhus, its pathogen is no longer included in genus ...
For perspective, there have been 2,559 cases of dengue fever reported in U.S. states and territories since the start of 2024, per the CDC. A large majority of those (1,724) were reported in Puerto ...
Crystal structure of the dengue virus, which causes dengue fever. ICD-10-PCS. A90. LOINC. 75377-2. NS1 antigen test (nonstructural protein 1) is a test for dengue, introduced in 2006. It allows rapid detection on the first day of fever, before antibodies appear some 5 or more days later. [ 1] It has been adopted for use in some 40 nations.
A positive tourniquet test on the right side of a patient with dengue fever. Note the increased number of petechia. A tourniquet test (also known as a Rumpel-Leede capillary-fragility test or simply a capillary fragility test) determines capillary fragility. It is a clinical diagnostic method to determine a patient's haemorrhagic tendency.
Causes. Dengue is a Flaviviridae virus, with five genetic types. [8] [9] Here is the virus drawn as a 3-dimensional model of the envelope protein. [10] Dengue is in the same family as other well known viruses carried by mosquitoes that cause tropical diseases, such as yellow fever, West Nile, and Zika virus. [11]
Vectors are living organisms that pass disease between humans or from animal to human. The vector carrying the highest number of diseases is the mosquito, which is responsible for the tropical diseases dengue and malaria. [17] Many different approaches have been taken to treat and prevent these diseases.