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BVMS 3 - Term II Parasites

Marielle83 Veterinary Parasitology BVMS Inglés 39 fichas

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1—Culicoides (midge)
2—Mosquito
3—Tabanus spp.
4—Haematopota
(wings have mottled pattern)
5—Musca domestica
6—Stomoxys calcitrans
7—Glossina morsitans
8—Glossina pupae
9—Glossina morsitans
10—Lucilia
(Green Bottle)
11—Lucilia pupae
12—Caliphora
(Blue Bottle)
13—Gasterophilus larva
14—Oestrus ovis larva
15—Melophagus ovinus
(Sheep ked)
16Which diseases/pathogens are transmitted by Musca spp.Helminths:
Habronema (summer sores), Raillietina (tapeworm), Parafilaria bovicola, Thelazia (eye worms)
Bacteria:
Moraxella bovis (New Forest Disease)
17Ixodes ricinus can transmit which pathogens?Babesia divergens (Red water)
Anaplasma (Tick-borne fever)
Flavivirus (Louping ill)
Borrelia burgdorferi (Lyme disease)
18List the characteristics of the Argas genus of ticks which are different from IxodesSoft tick
Mouth parts not visible from above
Adults and nymphs feed repeatedly
Larvae don't feed on host
Mating takes place off the host
Drought resistant
Can survive up to 2 years without feeding
19Which species of tick transmits both types of equine babesiosis?Dermacentor reticulatus
20Which type of babesia, small or large, is Babesia canis?Large, pathogenic
21For Babesia spp, in which host does the sexual reproduction take place?The tick
22Which is the most pathogenic Babesia spp. there is?Babesia bovis
Due to release of substances that activate plasma components which increase vascular permeability, vasodilation and intra-vascular coagulation --> circulatory stasis and shock --> destruction of RBC's and tissue anoxia (severe hypoxia)
23What is meant by "Enzootic Stability"?Where in a herd; calves have innate resistance and constant pathogen challenge is maintained but balanced by herd immunity, disease hence mild and transient
24Treatment for babesiosis?Imidocarb
25The 3 main species of Theileria and their hosts?T. annulata - Cattle
T. parva - Cattle
T. lestoquardi - Sheep/Goats
26What is meant by trans-stadial transmission?Infection acquired by one stage of tick and then transmitted by the next
e.g. for Theileria parva + annulata
27Name the vector for Ehrlichia ruminantumThe 3-host ornate hard tick Amblyomma
28List the measures of control of tick borne diseaseImmunity (Enzootic stability)
Vaccination against disease
Resistance (breeding work)
Eradication
Dipping
Vaccination against ticks
Pastures control (burning/spelling)
(Mnemonic: Insane Vikings Ruled Europe's Deep Vast Pastures)
29Clinical symptoms of Nagana?Muscle wasting
Anaemia
Reduced milk production
30Trypanosoma transmission vector?Tsetse fly
T. vivax also other biting flies
31Which Trypanosoma species has no sexual reproduction?T. vivax
32Why is it NOT possible to create a vaccine against Trypanosoma spp?Short stumpy form in mammals have Variable Surface Glycoprotein (VSG) coat with antigenic variation - by time Ig is created some will have changed coat and avoided getting destroyed
33List the control measures against TrypanosomaTrypanocidal drugs
Tsetse insecticides/traps/sterile male release
Breeding of trypano-tolerant cattle
34HAT - clinical signs?Organomegaly
Cardiac
GI
Neurologic
(coma and death if untreated)
35How is Trypanosoma evansi transmitted?Via coitus (in horses)
36Treatment against Neospora caninum in dogs?Clindamycin
37Describe the life cycle of SarcocystisFH eats sarcocyst - bradyzoites released - infect SI cell, directly form macro and microgametes - fuse to oocyst - sporulation in gut - released in faeces - IMH eats sporocyst - invade endothelial cells of mesenteric a. - asexual repro forming schizonts - merozoite produced and released - invades leukocytes schizont formed and produce merozoites - merozoites invade muscle cell - form bradyzoite within a sarcocyst
38What drug(s) would you use for treating sheep scab (Psoroptes ovis)?Injectible Moxidectin, Ivermectin or Doramectin
Organophosphate dipping (Diazinon)
39Psoroptes ovis life cycle?Female lay eggs (1-5 per day)
Larvae
Protonymph
Deutonymph, male female attachment
Adults
Eggs
11-14 days