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Volume 27, Number 1—January 2021
Research Letter

Racial and Workplace Disparities in Seroprevalence of SARS-CoV-2, Baton Rouge, Louisiana, USA

Amy K. FeehanComments to Author , Cruz Velasco, Daniel Fort, Jeffrey H. Burton, Eboni G. Price-Haywood, Peter T. Katzmarzyk, Julia Garcia-Diaz, and Leonardo Seoane
Author affiliations: Ochsner Clinic Foundation, New Orleans, Louisiana, USA (A.K. Feehan, C. Velasco, D. Fort, J.H. Burton, E.G. Price-Haywood, J. Garcia-Diaz, L. Seoane); The University of Queensland Faculty of Medicine, Ochsner Clinical School, New Orleans (A.K. Feehan, E.G. Price-Haywood, J. Garcia-Diaz, L. Seoane); Pennington Louisiana State University, Baton Rouge, Louisiana, USA (P.T. Katzmarzyk); Louisiana State University Health Sciences Center-Shreveport, Shreveport, Louisiana, USA (L. Seoane)

Main Article


Prevalence of past and present severe acute respiratory syndrome coronavirus 2 infections by race and ethnicity across Baton Rouge, Louisiana, after phased reopening, July 2020*

Race or ethnicity Positive no./total no. (% of sample) Residents >18 y, no. (% of population)* Any infection, raw,† % (95% CI) Any infection, weighted,‡ % (95% CI) Weighted point prevalence,§ % (95% CI) Weighted seroprevalence,¶ % (95% CI)
Total 128/2138 (100) 551,185 (100) 6.0 (5.0–7.1) 6.6 (5.7–7.7) 3.0 (2.3–3.7) 3.6 (2.8–4.4)
White alone 54/1431 (66.9) 332,445 (60.3) 3.8 (2.9–4.9) 4.2 (3.2–5.2) 2.4 (1.6–3.2) 1.8 (1.1–2.5)
Black or African American alone 57/516 (24.1) 177,950 (32.3) 11.0 (8.5–14.1) 11.0 (8.5–14.1) 3.5 (1.9–5.1) 7.5 (5.2–9.8)
Asian alone 2/59 (3.4) 13,630 (2.5) 3.4 (0.4–11.7) 3.5 (0.0–8.2) 1.7 (0.0–9.1) 1.7 (0.0–9.1)
Other# 1/28 (1.3) 7,025 (1.3) 3.6 (0.1–18.4) 2.7 (0.0–8.7) 0.0 2.7 (0.0–8.7)
Hispanic or Latino, any race 14/104 (4.9) 20,125 (3.7) 13.5 (7.6–21.6) 11.8 (5.6–18.0) 10.1 (4.3–15.9) 1.6 (0.0–4.0)

*Census 2018 population estimates. By August 2, 2020, a total of 17,093 state-aggregated, confirmed cases had been reported in Ascension, East Baton Rouge, Livingston, and West Baton Rouge parishes (4). 
†Percentage of sample with a PCR-positive test, an IgG-positive test, or both.
‡Census-weighted percentage of PCR-positive test, IgG-positive test, or both calculated to match 2018 racial demographics by parish and combined.
§Census-weighted percentage of PCR-positive and IgG-negative tests calculated to match 2018 racial demographics by parish and combined.
¶Census-weighted percentage of IgG–positive tests calculated to match 2018 racial demographics by parish and combined.
#Other includes American Indian or Alaska Native, Pacific Islander, and multiracial persons.

Main Article

  1. Feehan  AK, Fort  D, Garcia-Diaz  J, Price-Haywood  EG, Velasco  C, Sapp  E, et al. Seroprevalence of SARS-CoV-2 and infection fatality ratio, Orleans and Jefferson parishes, Louisiana, USA, May 2020. Emerg Infect Dis. 2020;26:27669. DOIPubMed
  2. Pollán  M, Pérez-Gómez  B, Pastor-Barriuso  R, Oteo  J, Hernán  MA, Pérez-Olmeda  M, et al.; ENE-COVID Study Group. Prevalence of SARS-CoV-2 in Spain (ENE-COVID): a nationwide, population-based seroepidemiological study. Lancet. 2020;396:53544. DOIPubMed
  3. Havers  FP, Reed  C, Lim  T, et al. Seroprevalence of Antibodies to SARS-CoV-2 in 10 sites in the United States, March 23–May 12, 2020. JAMA Intern Med. 2020 Jul 21 [Epub ahead of print].
  4. Louisiana Department of Public Health. Louisiana coronavirus COVID-19 information [cited 2020 Sep 20].
  5. Feehan  A, Fort  D, Garcia-Diaz  J, Price-Haywood  E, Velasco  C, Sapp  E, et al. Frequency of symptoms and asymptomatic SARS-CoV-2 infection in New Orleans, Louisiana after 7 weeks of a stay-at-home order [cited 2020 Sep 8].
  6. US Centers for Disease Control and Prevention. Interim guidelines for COVID-19 antibody testing [cited 2020 Aug 10].
  7. Bryan  A, Pepper  G, Wener  MH, Fink  SL, Morishima  C, Chaudhary  A, et al. Performance characteristics of the Abbott Architect SARS-CoV-2 IgG assay and seroprevalence in Boise, Idaho. J Clin Microbiol. 2020;58:e0094120. DOIPubMed

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Page created: October 23, 2020
Page updated: December 21, 2020
Page reviewed: December 21, 2020
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