The effect of chemical adjuvants of the survival of the free-living stages of the gastrointestinal nematode, Haemonchus contortus

• Main Author: Chang, Anthony T.
• Format: Others
• Published: BYU ScholarsArchive 1969
• Subjects: Nematodes; Life Sciences
• Online Access: https://scholarsarchive.byu.edu/etd/7653; https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=8653&context=etd

Considerable research has been done on the influence of various chemical adjuvants, such as glycerol and dimethyl sulfoxide (DMSO) on the survival of protozoan organisms. (Levine and Marquardt, 1955; Levine, Mizell and Houlahan, 1958; Levine, et al. 1962; Levine and Andersen, 1965, 1966; Fitzgerald and Levine 1957 1 1961; Diamond, 1964). Considerably less work has been done on metazoan parasites. The effects of various chemical adjuvants on the survival of Haemonchus contortus, the large stomach worm of sheep, at extremely low temperatures has not been reported. The purpose of this research was to determine if different concentrations of chemical adjuvants influence the survival of the free-living stages of H. contortus at temperatures ranging from 4 C to - 70 C.