Abstract | OBJECTIVES: METHODS: In the present study, 43 patients with confirmed SFTS were enrolled in our cohort, and 9 of them deceased. The clinical presentations and key laboratory parameters associated with SFTS fatality were also recorded. Serum samples from each patient were collected every 2 days during their hospitalization. NP-specific IgM and IgG responses as well as Gn or Gc-specific IgM responses were examined by enzyme-linked immunosorbent assay (ELISA), whereas, the dynamic viral loads of SFTSV RNA were quantified via real-time reverse transcription polymerase chain reaction (RT-PCR). RESULTS: First, 77% of patients generated positive NP-specific IgM antibody responses within two weeks since illness onset, defined as 'N-specific IgM-positive patients', while the rest of the patients were termed as 'N-specific IgM-delayed patients'. Only 17% of the patients generated NP-specific IgG responses. The absence of NP-specific humoral responses was strongly associated with a high risk of fatality and severity of SFTS. IgM-positive patients had significantly lower levels of viral loads, less disturbed coagulopathy, and hepatic and cardiac damage compared to IgM-delayed patients. Moreover, compared to severe or fatal SFTS patients, mild SFTS patients had significantly higher magnitudes of NP-specific IgM responses, but not NP-specific IgG, Gn-specific IgM, or Gc-specific IgM responses. The abundance of NP-specific IgM responses negatively correlated with viral loads, coagulation disturbances, and hepatic injuries among SFTS patients. CONCLUSIONS: Our data highlight distinct humoral profiles of NP-specific IgM responses among SFTS patients with different disease progressions and clinical outcomes.
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Authors | Gai Wang, Haiyan Chang, Bei Jia, Yong Liu, Rui Huang, Weihua Wu, Yingying Hao, Xiaomin Yan, Juan Xia, Yuxin Chen, Chao Wu |
Journal | Ticks and tick-borne diseases
(Ticks Tick Borne Dis)
Vol. 10
Issue 3
Pg. 639-646
(Apr 2019)
ISSN: 1877-9603 [Electronic] Netherlands |
PMID | 30824322
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2019. Published by Elsevier GmbH. |
Chemical References |
- Antibodies, Viral
- Immunoglobulin G
- Immunoglobulin M
- Nucleocapsid Proteins
- RNA, Viral
|
Topics |
- Adult
- Aged
- Aged, 80 and over
- Antibodies, Viral
(blood)
- Bunyaviridae Infections
(complications, immunology, mortality)
- China
- Cohort Studies
- Communicable Diseases, Emerging
(immunology, virology)
- Disease Progression
- Enzyme-Linked Immunosorbent Assay
- Female
- Fever
(etiology)
- Humans
- Immunity, Humoral
- Immunoglobulin G
(blood)
- Immunoglobulin M
(blood)
- Male
- Middle Aged
- Nucleocapsid Proteins
(immunology)
- Phlebovirus
- Prognosis
- Prospective Studies
- RNA, Viral
(genetics)
- Retrospective Studies
- Viral Load
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