What is the category of dengue fever?
The World Health Organization classifies dengue into 2 major categories: dengue (with / without warning signs) and severe dengue.
What are the 3 categories according to level of severity of dengue?
The WHO 1997 classification defines three categories of dengue infection according to severity: dengue fever (DF), dengue hemorrhagic fever (DHF), and dengue shock syndrome (DSS).
What is DHF and DSS in dengue?
DHF-dengue hemorrhagic fever. DSS-dengue shock syndrome.
What is Stage 3 dengue?
Stage III: This is the recovery phase. It usually takes a few days for the patients to get back to normal. At this stage, the patient gains back its appetite, has a slower pulse rate, has a convalescent rash at legs and arms.
What is the difference between DF and DHF?
DF is considered to be a mild disease because death is rarely reported, but massive bleeding may be associated with DF. DHF – clinical presentations during the febrile phase are similar to those in DF. The distinct feature of DHF is the increase in vascular permeability (plasma leakage) that differentiates DHF from DF.
What is PCV in dengue?
Patients with dengue had the highest packed cell volume (PCV), whereas patients with malaria had a low PCV. Patients with malaria had the lowest platelet count, patients with dengue had a platelet count of less than 100 000/mm3 and patients with leptospirosis had a near normal platelet count.
What is primary and secondary dengue infection?
Primary infection was defined as an IgM-negative/IgG-negative; or IgM-positive/IgG-negative on the blood sample drawn within 3 days of symptom onset. Secondary infection was defined as an IgM-negative/IgG-positive or an IgM-positive/IgG-positive result on the blood sample drawn within 3 days of symptom onset.
Which day is most critical in dengue?
A patient enters what is called the critical phase normally about 3-7 days after illness onset. It is at this time, when the fever is dropping (below 38°C/100°F) in the patient, that warning signs associated with severe dengue can manifest.
What is Second Stage dengue?
Stage II:Critical stage.(~Day 5-7), at this stage when the body temperature drops, normally within 24 hours, the plasma (Fluid part of blood component) leaks and the blood pressure will drop.
What is mild dengue?
Mild dengue fever causes a high fever and flu-like symptoms. The severe form of dengue fever, also called dengue hemorrhagic fever, can cause serious bleeding, a sudden drop in blood pressure (shock) and death.
What are the differences of dengue serotypes?
Previous reports of dengue in children have suggested that infection with secondary DENV-2 is more likely to result in severe disease compared with other serotypes. In contrast, primary DENV-1 cases were more overt whereas primary DENV-2 and DENV-3 cases were usually silent.
What are the signs and symptoms of DHF assessed as Grade II?
Symptoms include frontal headache, retro-orbital pain, myalgias, arthralgias, hemorrhagic manifestations, rash, and low white blood cell count. The patient also may complain of anorexia and nausea.
Is WBC count low in dengue?
Dengue fever is characterized by leucopenia (White Blood Cells (WBC) < 5000 cells/mm3), thrombocytopenia (< 150,000 cells/mm3), rising haematocrit (5–10%) and there should be no evidence of plasma leakage [10].
Why WBC is low in dengue?
This study may suggest that leukopenia in dengue fever may be caused by virus-induced destruction or inhibition of myeloid progenitor cells. Thrombocytopenia may result from by destruction of peripheral platelet or bone marrow megakaryocytes by viruses which consequently reduce the platelet production.
Which dengue serotype is most severe?
Severe dengue affected 6.6 % of all cases, of which 32.3 % of the cases caused by DENV-2, 6.4 % of those caused by DENV-4, 4.5 % of those caused by DENV-1, and none of those caused by DENV-3. Severe dengue was found to be seven times more frequent among cases of DENV-2 than among those of the other serotypes.