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False-positive dengue IgM test result in a patient with systemic lupus erythematosus: a case report Cover

False-positive dengue IgM test result in a patient with systemic lupus erythematosus: a case report

Open Access
|Oct 2020

Figures & Tables

Figure 1

Presentation of a 19-year-old acutely febrile patient from a region endemic for dengue. A. Shallow clear painless ulcer on the soft palate area. B. Erythematous macular rash on the malar area. C. Discoid rash on the ear. With consent for publication from the patient.
Presentation of a 19-year-old acutely febrile patient from a region endemic for dengue. A. Shallow clear painless ulcer on the soft palate area. B. Erythematous macular rash on the malar area. C. Discoid rash on the ear. With consent for publication from the patient.

Figure 2

A and B. Skin biopsy from an erythematous nonblanchable patch on the abdomen of the acutely febrile patient showing a pattern of vasculitis. Dense superficial and mid-perivascular and interstitial mixed inflammatory cell infiltrate composed of lymphohistiocytes, neutrophils, a few nuclear remnants, and extravasated red blood cells (hematoxylin and eosin staining; original magnification ×100; scale bars indicate 10 μm).
A and B. Skin biopsy from an erythematous nonblanchable patch on the abdomen of the acutely febrile patient showing a pattern of vasculitis. Dense superficial and mid-perivascular and interstitial mixed inflammatory cell infiltrate composed of lymphohistiocytes, neutrophils, a few nuclear remnants, and extravasated red blood cells (hematoxylin and eosin staining; original magnification ×100; scale bars indicate 10 μm).

Laboratory findings during hospitalization and follow-up of an acutely febrile patient with suspected dengue infection†

Day of fever24572nd wk5th wk6th wk8th wk
Body temperature (°C)39.839.437.236.836.536.236.536.5
Hematocrit (%)29.421.922.027.537.343.741.344.3
WBC (×103/μL)4.13.75.111.411.98.43.6
Neutrophils (%)64.059.071.079.075.062.041.0
Lymphocytes (%)14.020.022.020.020.028.050.0
Atypical lymphocytes (%)6.02.04.00000
Monocytes (%)3.04.03.004.09.08.0
Eosinophils (%)10.010.001.001.02.0
Basophils (%)00001.000
Platelet count (×103/μL)594358194275179202
AST (U/L)2816
ALT (U/L)1624
LDH (U/L)523769
NS1 AgNegative
Dengue virus IgM and IgG antibodiesPositive
DOI: https://doi.org/10.1515/abm-2020-0030 | Journal eISSN: 1875-855X | Journal ISSN: 1905-7415
Language: English
Page range: 209 - 213
Published on: Oct 31, 2020
Published by: Chulalongkorn University
In partnership with: Paradigm Publishing Services
Publication frequency: 6 issues per year

© 2020 Supitcha Kamolratanakul, Pravinwan Thungthong, Chajchawan Nakhakes, Chokchai Kittiyanpanya, Putza Chonsawat, Supat Chamnanchanunt, published by Chulalongkorn University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.