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COVID-19 seroprevalence in military police force, Southern Brazil.
Pasqualotto, Alessandro C; Pereira, Paula de Castro; Lana, Daiane F Dalla; Schwarzbold, Alexandre V; Ribeiro, Marco S; Riche, Cezar V W; Castro, Cristiani Pilati P; Korsack, Paula L; Ferreira, Paulo Emilio B; Domingues, Guilherme de C; Ribeiro, Giorgia T; Carneiro, Marcelo; Caurio, Cassia Ferreira B; Vasconcellos, Izadora Clezar da S; Knebel, Lidiana M; Zamberlan, Lucas; Stolz, Andressa P; Vilanova, Macarthur; Watte, Guilherme; Kalil, Antonio N.
  • Pasqualotto AC; Santa Casa de Misericordia de Porto Alegre, Porto Alegre, Brazil.
  • Pereira PC; Universidade Federal de Ciencias da Saude de Porto Alegre, UFCSPA, Porto Alegre, Brazil.
  • Lana DFD; Universidade Federal de Ciencias da Saude de Porto Alegre, UFCSPA, Porto Alegre, Brazil.
  • Schwarzbold AV; Universidade Federal de Ciencias da Saude de Porto Alegre, UFCSPA, Porto Alegre, Brazil.
  • Ribeiro MS; Universidade Federal de Santa Maria, UFSM, Santa Maria, Brazil.
  • Riche CVW; Universidade Católica de Pelotas, UCPEL, Pelotas, Brazil.
  • Castro CPP; Hospital Universitário de Canoas, Canoas, Brazil.
  • Korsack PL; Hospital Sao Vicente de Paulo, Passo Fundo, Brazil.
  • Ferreira PEB; Universidade Regional Unijui, Ijui, Brazil.
  • Domingues GC; Universidade Federal do Pampa, Unipampa, Uruguaiana, Brazil.
  • Ribeiro GT; Universidade do Vale do Taquari, Univates, Lajeado, Brazil.
  • Carneiro M; Círculo Operadora Integrada de Saúde, Caxias do Sul, Brazil.
  • Caurio CFB; Universidade de Santa Cruz do Sul, UNISC, Santa Cruz do Sul, Brazil.
  • Vasconcellos ICDS; Santa Casa de Misericordia de Porto Alegre, Porto Alegre, Brazil.
  • Knebel LM; Universidade Federal de Ciencias da Saude de Porto Alegre, UFCSPA, Porto Alegre, Brazil.
  • Zamberlan L; Santa Casa de Misericordia de Porto Alegre, Porto Alegre, Brazil.
  • Stolz AP; Universidade Federal de Ciencias da Saude de Porto Alegre, UFCSPA, Porto Alegre, Brazil.
  • Vilanova M; Brigada Militar do Rio Grande do Sul, Porto Alegre, Brazil.
  • Watte G; Brigada Militar do Rio Grande do Sul, Porto Alegre, Brazil.
  • Kalil AN; Brigada Militar do Rio Grande do Sul, Porto Alegre, Brazil.
PLoS One ; 16(4): e0249672, 2021.
Article in English | MEDLINE | ID: covidwho-1197375
ABSTRACT

BACKGROUND:

Limited data is available regarding the frequency of COVID-19 in populations that are highly exposed to SARS-CoV-2. In this cross-section study we evaluated COVID-19 seroprevalence in military police forces of 10 major cities in Rio Grande do Sul, South of Brazil.

METHODS:

Sampling was randomly performed in clusters, in respect to the number of professionals at service per city and military unit. Research subjects were evaluated on July 23, 2020 (first wave peak in Brazil). Clinical information was obtained, and venous blood was taken for ELISA testing (IgA, and IgG antibodies). Sample size consisted of 1,592 military workers (33.6% of study population). They were mostly man (81.2%) and young (median 34 years-old). Most had been asymptomatic (75.3%) during pandemic, and 27.5% reported close contact with COVID-19 cases (after a median time of 21 days). Antibodies were detected in 3.3% of the participants, mostly IgA (2.7%), and IgG (1.7%). After 3 weeks, 66.7% of IgA and IgG results turned negative, in addition to 78.3% and 100% of borderline IgA and IgG results, respectively.

CONCLUSION:

The seroprevalence of COVID-19 amongst military police was at least 3.4 higher than the findings of other studies performed in the general population, in the same cities and dates. Most detectable antibodies were of IgA class, which implies recent exposure. Asymptomatic people were more prone to have negative antibody titters in the second run.
Subject(s)

Full text: Available Collection: International databases Database: MEDLINE Main subject: COVID-19 Type of study: Diagnostic study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Limits: Adult / Female / Humans / Male / Middle aged Country/Region as subject: South America / Brazil Language: English Journal: PLoS One Journal subject: Science / Medicine Year: 2021 Document Type: Article Affiliation country: Journal.pone.0249672

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Full text: Available Collection: International databases Database: MEDLINE Main subject: COVID-19 Type of study: Diagnostic study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Limits: Adult / Female / Humans / Male / Middle aged Country/Region as subject: South America / Brazil Language: English Journal: PLoS One Journal subject: Science / Medicine Year: 2021 Document Type: Article Affiliation country: Journal.pone.0249672