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Volume 16, Number 5—May 2010

Letter

Serologic Survey of Hantavirus Infection, Brazilian Amazon

Wellington S. Mendes1, Antônio A.M. da Silva, Romerito F. Neiva, Nicolle M. Costa, Maressa S. de Assis, Priscila M.O. Vidigal, Maria da G. L. Leite, Elizabeth S.T. da Rosa, Daniele B. de A. Medeiros, Darlene de B. Simith, and Pedro F. da C. VasconcelosComments to Author 
Author affiliations: Federal University of Maranhão, São Luís, Brazil (W.S. Mendes, A.A.M. da Silva, R.M. Neiva, N.M. Costa, M.S. de Assis, P.M.O. Vidigal); Maranhão State Department of Health, São Luís (M.G.L. Leite); Evandro Chagas Institute, Belém, Brazil (E.S.T. Rosa, D.B. Medeiros, D.B. Simith, P.F.C. Vasconcelos)

Main Article

Table

Univariate analysis of risk factors associated with hantavirus infection in humans, Maranhão western lowlands, Brazil, 2006*

Possible risk factor SNV IgG positive, no. (%), n = 65 SNV IgG negative, no. (%), n = 1,324 OR (95% CI) p value
Storing grain in the house 38 (58.5) 774 (58.5) 1.00 (0.60–1.66) 0.999
Sweeping the house 53 (81.5) 1176 (88.8) 0.56 (0.29–1.06) 0.076
Seeing rats in the dwelling 47 (72.3) 742 (56.0) 2.05 (1.18–3.56) 0.011
Seeing rats in the fields 41 (63.1) 618 (46.7) 1.95 (1.17–3.27) 0.011
Having killed rats in the dwelling 46 (70.8) 686 (51.8) 2.25 (1.31–3.88) 0.004
Having killed rats in the fields 29 (44.6) 308 (23.3) 2.66 (1.60–4.40) <0.001
Being bitten by a rat 5 (7.7) 46 (3.5) 2.32 (0.89–6.04) 0.086
Seeing rat feces in the dwelling 34 (52.3) 609 (46.0) 1.29 (0.78–2.12) 0.320
Being a farmer 40 (61.5) 467 (35.3) 2.94 (1.76–4.90) <0.001
Using rat meat as fishing bait 1 (1.5) 13 (1.0) 1.58 (0.20–12.2) 0.664
Seeing buffaloes in the fields 26 (40.0) 518 (39.1) 1.04 (0.62–1.72) 0.888
Keeping a snake in the house 0 27 (2.0) Not calculated 0.245
Keeping a cat in the house 33 (50.8) 689 (52.0) 0.95 (0.58–1.56) 0.841
Keeping a dog in the house 39 (60.0) 890 (67.2) 0.73 (0.44–1.22) 0.229
Living in a dwelling close to the fields 47 (72.3) 868 (65.6) 1.37 (0.79–2.39) 0.264
Living near fruit trees 40 (61.5) 829 (62.6) 0.96 (0.57–1.59) 0.861
Living near the forest 29 (44.6) 599 (45.2) 0.98 (0.59–1.61) 0.921
Living in a house >30 m from the fields 23 (35.4) 477 (36.0) 0.97 (0.68–1.64) 0.916
Bathing in flooded fields 27 (41.5) 429 (32.4) 1.48 (0.89–2.46) 0.128
Fishing in flooded fields 43 (66.2) 797 (60.2) 1.29 (0.76–2.19) 0.339
Being age 20–29 y 12 (18.5) 266 (20.1) 7.31 (2.04–26.1) 0.002
Being age 30–39 y 8 (12.3) 226 (17.1) 5.73 (1.51–21.8) 0.010
Being age >40 y 42 (64.6) 346 (26.1) 19.7 (6.05–64.0) <0.001
Being male 38 (58.5) 590 (44.6) 1.75 (1.06–2.90) 0.030

*SNV, Sin Nombre virus; Ig, immunoglobulin; OR, odds ratio; CI, confidence interval.

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1Deceased

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