Gibbs H C, Crenshaw W J, Mowatt M
J Wildl Dis. 1977 Jul;13(3):327-32. doi: 10.7589/0090-3558-13.3.327.
The stomachs of 141 (96.5%) of 146 snowshoe hares (Lepus americanus) collected in the area of East Corinth, Maine between the months of February, 1972 and February, 1973 were infected with Obeliscoides cuniculi. Nematodes were counted in 140 infected adult hares. The greatest intensity of infection occurred during the period from spring into summer (March to July) and at this time the populations of nematodes were mainly adults. During this period, female hares harbored significantly greater numbers of nematodes than males. Lowest numbers of nematodes were seen in late fall and early winter (October to December). The proportions of immature (fourth stage) nematodes in the populations increased appreciably from late summer on into winter and by December these constituted some 60% of the total population. A marked decline in immature nematode numbers was observed after February, with a concurrent increase in numbers of adults. A well-defined cyclical population fluctuation in natural infections of O. cuniculi was evident.
1972年2月至1973年2月期间，在缅因州东科林斯地区捕获的146只美洲兔（Lepus americanus）中，有141只（96.5%）的胃被兔艾美耳线虫（Obeliscoides cuniculi）感染。对140只受感染的成年野兔体内的线虫进行了计数。感染强度最大的时期是从春季到夏季（3月至7月），此时线虫种群主要为成虫。在此期间，雌性野兔体内的线虫数量明显多于雄性。在深秋和初冬（10月至12月）观察到线虫数量最少。从夏末到冬季，种群中未成熟（第四阶段）线虫的比例明显增加，到12月，这些线虫约占总种群的60%。2月之后，未成熟线虫数量显著下降，同时成虫数量增加。兔艾美耳线虫自然感染呈现出明确的周期性种群波动。
