tetano
Editor, Senior Moderator
Can Respir J
. 2022 Aug 29;2022:5460400.
doi: 10.1155/2022/5460400. eCollection 2022.
Viral RNA Load in Symptomatic and Asymptomatic COVID-19 Omicron Variant-Positive Patients
Qian Wu[SUP] 1 2 3 [/SUP], Lixia Shi[SUP] 2 4 [/SUP], Haomin Li[SUP] 5 [/SUP], Shuping Huang[SUP] 4 [/SUP], Hongwei Li[SUP] 2 [/SUP], Li Li[SUP] 2 [/SUP], Jin Han[SUP] 4 [/SUP], Qi Wu[SUP] 1 3 6 [/SUP], Zhengcun Pei[SUP] 7 [/SUP]
Affiliations
Abstract
Objectives: Viral load is important when evaluating viral transmission potential, involving the use of a polymerase chain reaction (PCR) cycle threshold (Ct) value. We aimed to analyze the PCR Ct values of respiratory tract samples taken from patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron variant strains to evaluate these strains' viral dynamics.
Methods: This study comprised 361 patients. The Ct values of SARS-CoV-2-related respiratory samples were compared between symptomatic and asymptomatic patients.
Results: The median (25[SUP]th[/SUP] percentile and 75[SUP]th[/SUP] percentile) nasopharynx and oropharynx SARS-CoV-2 Ct values were 30.5 (24.5-35.0) and 34.5 (30.0-37.0) in the symptomatic group, respectively, and 27.8 (23.4-34.5) and 33.5 (26.0-35.0) in the asymptomatic group, respectively, without significance. In the symptomatic group, subgroup analyses according to age showed the mean nasal Ct value for patients aged >18 years was 29.0 (23.5-34.5), which was significantly lower than that of patients aged 0-4 years and 5-13 years (36.0 (30.5-38.0) and 34.5 (31.0-39.0), respectively). The nasal Ct value for asymptomatic patients aged >18 years was 25.5 (20.9-28.4), which was significantly lower than of patients aged 5-13 years (34.5 (25.6-36.4)).
Conclusion: Our findings suggest that the viral loads of asymptomatic and symptomatic patients did not differ significantly. However, adults infected with SARS-CoV-2 had higher nasal viral loads that those of young children.
. 2022 Aug 29;2022:5460400.
doi: 10.1155/2022/5460400. eCollection 2022.
Viral RNA Load in Symptomatic and Asymptomatic COVID-19 Omicron Variant-Positive Patients
Qian Wu[SUP] 1 2 3 [/SUP], Lixia Shi[SUP] 2 4 [/SUP], Haomin Li[SUP] 5 [/SUP], Shuping Huang[SUP] 4 [/SUP], Hongwei Li[SUP] 2 [/SUP], Li Li[SUP] 2 [/SUP], Jin Han[SUP] 4 [/SUP], Qi Wu[SUP] 1 3 6 [/SUP], Zhengcun Pei[SUP] 7 [/SUP]
Affiliations
- PMID: 36072643
- PMCID: PMC9444452
- DOI: 10.1155/2022/5460400
Abstract
Objectives: Viral load is important when evaluating viral transmission potential, involving the use of a polymerase chain reaction (PCR) cycle threshold (Ct) value. We aimed to analyze the PCR Ct values of respiratory tract samples taken from patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron variant strains to evaluate these strains' viral dynamics.
Methods: This study comprised 361 patients. The Ct values of SARS-CoV-2-related respiratory samples were compared between symptomatic and asymptomatic patients.
Results: The median (25[SUP]th[/SUP] percentile and 75[SUP]th[/SUP] percentile) nasopharynx and oropharynx SARS-CoV-2 Ct values were 30.5 (24.5-35.0) and 34.5 (30.0-37.0) in the symptomatic group, respectively, and 27.8 (23.4-34.5) and 33.5 (26.0-35.0) in the asymptomatic group, respectively, without significance. In the symptomatic group, subgroup analyses according to age showed the mean nasal Ct value for patients aged >18 years was 29.0 (23.5-34.5), which was significantly lower than that of patients aged 0-4 years and 5-13 years (36.0 (30.5-38.0) and 34.5 (31.0-39.0), respectively). The nasal Ct value for asymptomatic patients aged >18 years was 25.5 (20.9-28.4), which was significantly lower than of patients aged 5-13 years (34.5 (25.6-36.4)).
Conclusion: Our findings suggest that the viral loads of asymptomatic and symptomatic patients did not differ significantly. However, adults infected with SARS-CoV-2 had higher nasal viral loads that those of young children.