Research concerning the elk lungworm, Dictyocaulus sp., was continued in the spring (late May-early June), summer (July), and fall (October) of 1971. A higher incidence of lungworm-positive elk was noted in these data (40% spring and 47% summer, see Fig 1) than in those data of past years. Fall necropsy data were limited to lungs from Refuge hunter kills in mid-October. Seventy per cent of those lungs were positive for Dictyocaulus sp. adults. A 12% incidence was found in Big Game Ridge elk in mid-July. Project Number 156.
Bergstrom, Robert C.
"Parasites of Ungulates in the Jackson Hole Area,"
Jackson Hole Research Station Annual Report: Vol. 1971
, Article 6.
Available at: http://repository.uwyo.edu/jhrs_reports/vol1971/iss1/6