You are not currently logged in.
Access JSTOR through your library or other institution:
Trichinella spiralis in an Agricultural Ecosystem: Transmission in the Rat Population
David A. Leiby, Charles H. Duffy, K. Darwin Murrell and Gerhard A. Schad
The Journal of Parasitology
Vol. 76, No. 3 (Jun., 1990), pp. 360-364
Stable URL: http://www.jstor.org/stable/3282667
Page Count: 5
Preview not available
Four hundred forty-three Norway rats (Rattus norvegicus) were examined to determine their role in the transmission and maintenance of Trichinella spiralis on a pig farm. Rats, classified by sex and weight, were examined for trichinellosis by peptic digestion of muscle samples. Over a 25-mo period, 188 (42.4%) rats were found to be infected with T. spiralis. The mean intensity of infection was 293.2 larvae per gram (LPG) of muscle; 65 (34.6%) infected rats had intensities of infection > 100 LPG. Even in the absence of a known source of infected meat (garbage containing meat scraps or dead animals), the rat population maintained the infection, probably through cannibalism. Population reduction was an effective method for reducing the prevalence of infection within the rat population. Therefore, to reduce the likelihood of transmission of T. spiralis between rats and swine, it is essential that rat populations in a farmyard environment be controlled.
The Journal of Parasitology © 1990 The American Society of Parasitologists