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Volume 8, Number 5—May 2002

Research

Epidemiology of Urban Canine Rabies, Santa Cruz, Bolivia, 1972–1997

Marc-Alain Widdowson*Comments to Author , Gustavo J. Morales†, Sandra Chaves‡, and James McGrane*
Author affiliations: *Unidad Nacional de Epidemiología Veterinaria, Santa Cruz, Bolivia; †Laboratorio de Investigación y Diagnóstico Veterinario, Santa Cruz, Bolivia; ‡Rijksinstituut voor Volksgezonheid en Mileu (RIVM), Bilthoven, the Netherlands;

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Table

Canine laboratory samples examined for rabies and odds ratios for positive result, Santa Cruz, Bolivia, 1972–1997

Clinical and demographic
characteristics % of canine populationa No. of samples No. (%) positive OR
(95% CIb)
Sex
Female 50 2,969 1,419 (47.9) 1
Male 50 5,655 2,887 (51.1) 1.14
 (1.04 to 1.25)
Unknown 684 368 (56.7)
Age group
<3 mo 20.6 1,624 713 (43.9) 1
3 mo to l yr 16.7 3,273 1,762 (53.8) 1.49 (1.32 to 1.68)
<l yr to 2 yrs 18.8 743 802 (57.5) 1.73 (1.49 to 2.00)
>2 yrs to 3 yrs 13.2 1,395 364 (49.0) 1.23 (1.03 to 1.47)
>3 yrs 30.7 1,317 463 (35.5) 0.69 (0.59 to 0.81)
Unknown 956 590 (61.7)
Ring roadc
Within 4th 50.4 631 132 (20.9) 1
4th and beyond 49.6 488 152 (31.4) 1.71(1.29 to 2.26)
Unknown 8,189 4,410 (53.9)
Total 100 9,308 4,694 (50.4)

a Percentages of total population of owned dogs (228,170) as estimated in 1996 (LIDIVET, unpub. data).
b Confidence interval.
c Data only available since 1994.

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