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Ramirez-Hinojosa JP, Rodriguez-Sanchez Y, Romero-Gonzalez AK, Chavez-Gutierrez M, Gonzalez-Arenas NR, Ibarra-Arce A, Arroyo-Escalante S, Zavaleta-Villa B, Leon-Juarez M, Cruz-Holguin VJ, Espinosa de Los Monteros-Perez LE, Olivo-Diaz A, Hernandez-Castro R, Suarez-Roa L, Prado-Calleros H, Sierra-Martinez O, Avila-Ramirez G, Flisser A, Maravilla P, Romero-Valdovinos M. Association between cycle threshold (C t ) values and clinical and laboratory data in inpatients with COVID-19 and asymptomatic health workers. J Med Virol 2021; 93:5969-5976. [PMID: 34196423 PMCID: PMC8427125 DOI: 10.1002/jmv.27170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 06/28/2021] [Indexed: 12/18/2022]
Abstract
In‐house assays for the diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) by quantitative reverse‐transcription polymerase chain reaction (qRT‐PCR), are feasible alternatives, particularly in developing countries. Cycle threshold (Ct) values obtained by qRT‐PCR were compared with clinical and laboratory data from saliva of inpatients with COVID‐19 and asymptomatic health workers (AHW) were studied. Saliva specimens from 58 inpatients confirmed by qRT‐PCR for SARS‐CoV‐2 using nasopharyngeal specimens, and 105 AHW were studied by qRT‐PCR using three sets of primers for the N (N1, N2, and N3) gene of SARS‐CoV‐2, according to the CDC Diagnostic Panel protocol, showing a positivity of 88% for inpatients and 8% for AHW. Bivariate analysis revealed an association between Ct < 38.0 values for N2 and mechanical ventilation assistance among patients (p = .013). In addition, values of aspartate‐transaminase, lactate dehydrogenase, and ferritin showed significant correlations with Ct values of N1 and N3 genes in inpatients. Therefore, our results show that Ct values correlate with some relevant clinical data for inpatients with COVID‐19.
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Affiliation(s)
| | | | | | | | | | - Aurora Ibarra-Arce
- División de Parasitología, Hospital General "Dr. Manuel Gea Gonzalez", Mexico City, Mexico
| | - Sara Arroyo-Escalante
- División de Parasitología, Hospital General "Dr. Manuel Gea Gonzalez", Mexico City, Mexico
| | - Beatriz Zavaleta-Villa
- División de Parasitología, Hospital General "Dr. Manuel Gea Gonzalez", Mexico City, Mexico
| | - Moises Leon-Juarez
- Departamento de Inmunobioquimica, Instituto Nacional de Perinatologia, Mexico City, Mexico
| | | | | | - Angelica Olivo-Diaz
- División de Parasitología, Hospital General "Dr. Manuel Gea Gonzalez", Mexico City, Mexico
| | | | - Lourdes Suarez-Roa
- División de Parasitología, Hospital General "Dr. Manuel Gea Gonzalez", Mexico City, Mexico
| | - Hector Prado-Calleros
- División de Parasitología, Hospital General "Dr. Manuel Gea Gonzalez", Mexico City, Mexico
| | | | - Guillermina Avila-Ramirez
- Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autonoma de Mexico (UNAM), Mexico City, Mexico
| | - Ana Flisser
- Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autonoma de Mexico (UNAM), Mexico City, Mexico
| | - Pablo Maravilla
- División de Parasitología, Hospital General "Dr. Manuel Gea Gonzalez", Mexico City, Mexico
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Toral-Bastida E, Garza-Rodriguez A, Jimenez-Gonzalez DE, Garcia-Cortes R, Avila-Ramirez G, Maravilla P, Flisser A. Development of Taenia pisiformis in golden hamster (Mesocricetus auratus). Parasit Vectors 2011; 4:147. [PMID: 21787386 PMCID: PMC3159142 DOI: 10.1186/1756-3305-4-147] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 07/25/2011] [Indexed: 12/02/2022] Open
Abstract
The life cycle of Taenia pisiformis includes canines as definitive hosts and rabbits as intermediate hosts. Golden hamster (Mesocricetus auratus) is a rodent that has been successfully used as experimental model of Taenia solium taeniosis. In the present study we describe the course of T. pisiformis infection in experimentally infected golden hamsters. Ten females, treated with methyl-prednisolone acetate were infected with three T. pisiformis cysticerci each one excised from one rabbit. Proglottids released in faeces and adults recovered during necropsy showed that all animals were infected. Eggs obtained from the hamsters' tapeworms, were assessed for viability using trypan blue or propidium iodide stains. Afterwards, some rabbits were inoculated with eggs, necropsy was performed after seven weeks and viable cysticerci were obtained. Our results demonstrate that the experimental model of adult Taenia pisiformis in golden hamster can replace the use of canines in order to study this parasite and to provide eggs and adult tapeworms to be used in different types of experiments.
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Affiliation(s)
- Elizabeth Toral-Bastida
- Hospital General Dr. Manuel Gea Gonzalez, SSA, Calzada de Tlalpan 4800, Col Seccion XVI, Tlalpan, Mexico 14080 DF
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