Laboratory markers associated with the persistence detection of SARS-CoV-2

Authors

Keywords:

persistence, laboratory markers, SARS-CoV-2.

Abstract

Introduction: The prolonged persistence of SARS-CoV-2 in the nasopharyngeal tract in some patients was one of the primary challenges posed by the virus.

Objectives: To determine the relationship between laboratory markers in COVID-19 patients and the persistence detection of SARS-CoV-2 in the nasopharynx.

Methods: It was conducted a retrospective observational study of patients with a SARS-CoV-2 positive PCR. The control group comprised patients with one positive PCR followed by two negative results, while the case group consisted of patients with at least three consecutive positive PCR tests. The time interval between consecutive samples ranged from 5 to 20 days, and only patients with SARS-CoV-2 negative serology were included. Data on demographics, comorbidities, symptoms, radiology, hospitalization, laboratory analyses, and gasometry were collected.

Results: The control group exhibited higher CT values compared to the case group, irrespective of symptoms, radiological patterns, or the PCR equipment used. Patients with persistent detection showed higher percentages of monocytes and lower percentages of lymphocytes, as well as elevated levels of amylase, C-reactive protein, and D-dimer. The deoxyhemoglobin fraction values in venous gasometry were higher in the case group; while oxyhemoglobin, oxygen saturation and partial oxygen pressure values were lower.

Conclusions: Some laboratory markers could be associated with the prolonged detection of SARS-CoV-2 in the nasopharynx, facilitating resource optimization in the laboratory and the proper planning of socio-sanitary measures.

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Author Biographies

José María López-Pintor, Hospital General La Mancha Centro, Servicio de Microbiología.

Desempeño mi función como microbiólogo clínico en el Hospital General La Mancha Centro, de la localidad Alcázar de San Juan

Óscar Herraez Carrera, Hospital General La Mancha Centro, Servicio de Análisis Clínicos

Desempeña su función como Analista Clínico en el Hospital General La Mancha Centro, Alcázar de San Juan.

Además es el jefe de servicio del departamento de investigación, docencia y formación, y el responsable de calidad del hospital.

Javier Sánchez-López, Hospital General La Mancha Centro, Servicio de Microbiología

Desempeña su función como Microbiólogo Clínico en el Hospital General La Mancha Centro, de Alcázar de San Juan.

Jorge Gaitán Pitera, Hospital General La Mancha Centro, Servicio de Microbiología

Desempeña su función como Microbiólogo Clínico en el Hospital General La Mancha Centro, de Alcázar de San Juan.

María Huertas Vaquero, Hospital General La Mancha Centro, Servicio de Microbiología

Desempeña su función como Microbiólogo Clínico en el Hospital General La Mancha Centro, de Alcázar de San Juan.

Ángel Arias-Arias, Hospital General La Mancha Centro, Unidad de Investigación, Formación y Desarrollo (IDF)

Desempeña su función en el departamento de investigación, docencia y formación del Hospital General La Mancha Centro, de Alcázar de San Juan.

María Ángeles Asencio Egea, Hospital General La Mancha Centro, Servicio de Microbiología

Desempeña su función como Microbiólogo Clínico en el Hospital General La Mancha Centro, de Alcázar de San Juan.

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Published

2024-06-24

How to Cite

1.
López-Pintor JM, Herraez Carrera Óscar, Sánchez-López J, Gaitán Pitera J, Huertas Vaquero M, Arias-Arias Ángel, et al. Laboratory markers associated with the persistence detection of SARS-CoV-2. Rev Cuba Med Tropical [Internet]. 2024 Jun. 24 [cited 2025 Feb. 21];76. Available from: https://revmedtropical.sld.cu/index.php/medtropical/article/view/954

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