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10.1016/j.cmi.2020.08.043

http://scihub22266oqcxt.onion/10.1016/j.cmi.2020.08.043
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suck abstract from ncbi


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pmid32898715      Clin+Microbiol+Infect 2020 ; 26 (12): 1690.e1-1690.e4
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  • The kinetics of viral load and antibodies to SARS-CoV-2 #MMPMID32898715
  • Sun J; Tang X; Bai R; Liang C; Zeng L; Lin H; Yuan R; Zhou P; Huang X; Xiong Q; Peng J; Cui F; Ke B; Su J; Liu Z; Lu J; Tian J; Sun R; Ke C
  • Clin Microbiol Infect 2020[Dec]; 26 (12): 1690.e1-1690.e4 PMID32898715show ga
  • OBJECTIVES: The aim was to understand persistence of the virus in body fluids the and immune response of an infected host to severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), an agent of coronavirus disease 2019 (COVID-19). METHODS: We determined the kinetics of viral load in several body fluids through real time reverse transcription polymerase chain reaction, serum antibodies of IgA, IgG and IgM by enzyme-linked immunosorbent assay and neutralizing antibodies by microneutralization assay in 35 COVID-19 cases from two hospitals in Guangdong, China. RESULTS: We found higher viral loads and prolonged shedding of virus RNA in severe cases of COVID-19 in nasopharyngeal (1.3 x 10(6) vs 6.4 x 10(4), p < 0.05; 7 approximately 8 weeks) and throat (6.9 x 10(6) vs 2.9 x 10(5), p < 0.05; 4 approximately 5 weeks), but similar in sputum samples (5.5 x 10(6) vs 0.9 x 10(6), p < 0.05; 4 approximately 5 weeks). Viraemia was rarely detected (2.8%, n = 1/35). We detected early seroconversion of IgA and IgG at the first week after illness onset (day 5, 5.7%, n = 2/35). Neutralizing antibodies were produced in the second week, and observed in all 35 included cases after the third week illness onset. The levels of neutralizing antibodies correlated with IgG (r(s) = 0.85, p < 0.05; kappa = 0.85) and IgA (r(s) = 0.64, p < 0.05; kappa = 0.61) in severe, but not mild cases (IgG, r(s) = 0.42, kappa = 0.33; IgA, r(s) = 0.32, kappa = 0.22). No correlation with IgM in either severe (r(s) = 0.17, kappa = 0.06) or mild cases (r(s) = 0.27, kappa = 0.15) was found. DISCUSSION: We revealed a prolonged shedding of virus RNA in the upper respiratory tract, and evaluated the consistency of production of IgG, IgA, IgM and neutralizing antibodies in COVID-19 cases.
  • |*Viral Load[MESH]
  • |*Virus Shedding[MESH]
  • |Antibodies, Neutralizing/blood[MESH]
  • |Antibodies, Viral/*blood[MESH]
  • |Body Fluids/*virology[MESH]
  • |COVID-19 Nucleic Acid Testing[MESH]
  • |COVID-19 Serological Testing[MESH]
  • |COVID-19/*immunology[MESH]
  • |China[MESH]
  • |Humans[MESH]
  • |Immunoglobulin A/blood[MESH]
  • |Immunoglobulin G/blood[MESH]
  • |Immunoglobulin M/blood[MESH]
  • |Kinetics[MESH]
  • |Nasopharynx/virology[MESH]
  • |Pandemics[MESH]
  • |Pharynx/virology[MESH]
  • |RNA, Viral/genetics[MESH]
  • |Respiratory System/virology[MESH]
  • |SARS-CoV-2[MESH]


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