Abstract
High seroprevalence rates for Anaplasma phagocytophilum (8.8%), Coxiella burnetii (6.4%), Bartonella henselae (9.6%), and Rickettsia typhi (4.1%) in 365 farm workers near Tianjin, People’s Republic of China, suggest that human infections with these zoonotic bacteria are frequent and largely unrecognized. Demographic features of seropositive persons suggest distinct epidemiology, ecology, and risks.
Highlights
High seroprevalence rates for Anaplasma phagocytophilum (8.8%), Coxiella burnetii (6.4%), Bartonella henselae (9.6%), and Rickettsia typhi (4.1%) in 365 farm workers near Tianjin, People’s Republic of China, suggest that human infections with these zoonotic bacteria are frequent and largely unrecognized
The E. chaffeensis strain used was provided by the US Centers for Disease Control and Prevention (Atlanta, GA, USA), and the R. typhi, C. burnetii, and B. henselae strains and antigens used were provided by the World Health Organization Collaborating Center for Rickettsial Diseases (Marseille, France)
The emerging pathogens A. phagocytophilum and E. chaffeensis are transmitted by tick vectors [1,2], and R
Summary
High seroprevalence rates for Anaplasma phagocytophilum (8.8%), Coxiella burnetii (6.4%), Bartonella henselae (9.6%), and Rickettsia typhi (4.1%) in 365 farm workers near Tianjin, People’s Republic of China, suggest that human infections with these zoonotic bacteria are frequent and largely unrecognized. Despite evidence of Anaplasma phagocytophilum and Ehrlichia chaffeensis in ticks and rodents in the People’s Republic of China [3,4,5,6,7], few investigations have been conducted. A seroepidemiologic investigation was undertaken to assess exposure to A. phagocytophilum, E. chaffeensis, Bartonella henselae, Coxiella burnetii, and Rickettsia typhi among persons on 8 farms in 7 districts and rural counties near Tianjin, China.
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