5 Written questions
3 Matching questions
- large strongyles
- onchocerca cervicalis
- a adults live in the nucei ligament. Females produce microfilaria that migrate to the dermis.
- b small strongyles.
- c Can interfere with blood supply to gut and cause infarction and death. Likely involved with some types of colic in horses.
5 Multiple choice questions
- cause irritation which leads to rubbing and scratching and hair loss. Sucking lice can lead to anemia generally in young foals.
- adults are large, segmented with scolex at anterior end. Up to 8 m long. Eggs are irregularly shaped and contain 6 hooked larva. Similar to monezia in ruminants.
- used to be an important zoonotic disease but not so common now due to public awareness.
- causes CNS signs such as ataxia, weakness, stumbling, etc. Has a complex poorly understood life cycle.
5 True/False questions
chewing lice → mainly a winter problem. can survive 2-3 days off of the host. Lay nits on hair shaft. They are host specific and transmitted by direct contact.
parascaris equorum → adults are very large. Males 15-28 cm and females 50 cm long. Eggs have a spherical rough shell, dark amber to brown. Ova survives in evironment for years.
chorioptic mange → damalinia equi.
cyathostomes → adult flies are transversely striped and look similar to bees, no mouth parts. Larvae 1-2 cmc in length, yellowish or red-brown with transverse segmentation and short bristles.
oxyuris equi → male adults are small 12 mm and not usually seen but females can be up to 6 inches long, pale with white pin-like tail. Ova are pale, elongated with 1 flattened side and operculum on 1 end.