Rabies exposures, post-exposure prophylaxis and deaths in a region of endemic canine rabies.
BACKGROUND
Thousands of human deaths from rabies occur annually despite the availability of effective vaccines following exposure, and for disease control in the animal reservoir. Our aim was to assess risk factors associated with exposure and to determine why human deaths from endemic canine rabies still occur.


RESULTS
Contact tracing was used to gather data on rabies exposures, post-exposure prophylaxis (PEP) delivered and deaths in two rural districts in northwestern Tanzania from 2002 to 2006. Data on risk factors and the propensity to seek and complete courses of PEP was collected using questionnaires. Exposures varied from 6-141/100,000 per year. Risk of exposure to rabies was greater in an area with agropastoralist communities (and larger domestic dog populations) than an area with pastoralist communities. Children were at greater risk than adults of being exposed to rabies and of developing clinical signs. PEP dramatically reduced the risk of developing rabies (odds ratio [OR] 17.33, 95% confidence interval [CI] 6.39-60.83) and when PEP was not delivered the risks were higher in the pastoralist than the agro-pastoralist area (OR 6.12, 95% CI 2.60-14.58). Low socioeconomic class and distance to medical facilities lengthened delays before PEP delivery. Over 20% of rabies-exposed individuals did not seek medical treatment and were not documented in official records and <65% received PEP. Animal bite injury records were an accurate indicator of rabies exposure incidence.


CONCLUSIONS
Insufficient knowledge about rabies dangers and prevention, particularly prompt PEP, but also wound management, was the main cause of rabies deaths. Education, particularly in poor and marginalized communities, but also for medical and veterinary workers, would prevent future deaths.
Hampson
Katie
K
Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, United Kingdom. K.Hampson@Shef.ac.uk
Dobson
Andy
A
Kaare
Magai
M
Dushoff
Jonathan
J
Magoto
Matthias
M
Sindoya
Emmanuel
E
Cleaveland
Sarah
S
D000293:Adolescent; D000328:Adult; D000349:Africa / Q000453:epidemiology; D000368:Aged; D000818:Animals; D000829:Animals, Domestic / Q000469:parasitology; D001208:Asia / Q000453:epidemiology; D001733:Bites and Stings / Q000469:parasitology; D002648:Child; D002675:Child, Preschool; D004283:Dog Diseases / Q000469:parasitology*; D004285:Dogs; D006801:Humans; D007223:Infant; D008875:Middle Aged; D011818:Rabies / Q000453:epidemiology / Q000401:mortality / Q000635:transmission* / Q000662:veterinary*; D012307:Risk Factors; D012424:Rural Population; D011795:Surveys and Questionnaires; D013636:Tanzania / Q000453:epidemiology