ABSTRACT
BACKGROUND: Dengue is an important mosquito-borne viral infection that affects millions of persons worldwide. Early diagnosis is necessary to effect appropriate management and decrease mortality. Immunochromatographic tests are advantageous in producing dengue test results within 30 min but these results should be sensitive and specific. In this study we evaluated the diagnostic performance of the SD BIOLINE Dengue DUO® rapid immunochromatographic test kit. A panel of 309 dengue and 30 non-dengue single serum samples characterized by using reference enzyme-linked immunosorbent assays (ELISAs) was used. These samples were received in the virology laboratory for routine testing during a dengue type 1 outbreak between October to December, 2012. RESULTS: The overall diagnostic sensitivities of the SD BIOLINE Dengue DUO® rapid testfor IgM, IgG and NSI were 49.3% (95% CI: 41.3-57.4), 39.1% (95% CI: 33.3-45.2) and 90% (95% CI: 82.1-94.7), respectively. The IgM and IgG detection rates were significantly lower than that of the NSI (p < 0.001). However the combination of the IgM detection with NS1 detection or both NS1 and IgG resulted in a significant (p < 0.001) increase in sensitivity to 97.5% (95 % CI: 92.9-99.2) and 98.9% (95 % CI: 96.0-99.7), respectively. These higher sensitivities were achieved without any decrease in specificities. CONCLUSIONS: This study revealed that combining two or more parameters of the SD BIOLINE Dengue DUO® rapid kit significantly improved the sensitivity of diagnosis of dengue virus infection and supports its usefulness in the Jamaican setting.
Subject(s)
Antibodies, Viral/isolation & purification , Dengue Virus/isolation & purification , Dengue/diagnosis , Reagent Kits, Diagnostic , Viral Nonstructural Proteins/isolation & purification , Adolescent , Adult , Aged , Aged, 80 and over , Antibodies, Viral/immunology , Child , Child, Preschool , Dengue/immunology , Dengue/virology , Dengue Virus/immunology , Dengue Virus/pathogenicity , Enzyme-Linked Immunosorbent Assay/methods , Epidemics , Female , Humans , Immunoglobulin G/immunology , Immunoglobulin G/isolation & purification , Immunoglobulin M/immunology , Immunoglobulin M/isolation & purification , Infant , Infant, Newborn , Jamaica , Male , Middle Aged , Viral Nonstructural Proteins/immunologyABSTRACT
Since 1963, reported malaria transmission in Haiti has been restricted to Plasmodium falciparum. However, screening of Haitian refugees in Jamaica in 2004, by microscopic examination, identified P. falciparum, P. vivax, and P. malariae. PCR confirmed the P. malariae and P. falciparum but not P. vivax infections. DNA sequencing and rRNA gene sequences showed transmission of P. malariae. This report confirms that P. malariae is still being transmitted in Haiti.
