2244344
Description
Flashcards by Marielle83, updated more than 1 year ago
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Created by Marielle83
over 10 years ago
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| Question | Answer |
| Culicoides (midge) | |
| Mosquito | |
| Tabanus spp. | |
| Haematopota (wings have mottled pattern) | |
| Musca domestica | |
| Stomoxys calcitrans | |
| Glossina morsitans | |
| Glossina pupae | |
| Glossina morsitans | |
| Lucilia (Green Bottle) | |
| Lucilia pupae | |
| Caliphora (Blue Bottle) | |
| Gasterophilus larva | |
| Oestrus ovis larva | |
| Melophagus ovinus (Sheep ked) | |
| Which diseases/pathogens are transmitted by Musca spp. | Helminths: Habronema (summer sores), Raillietina (tapeworm), Parafilaria bovicola, Thelazia (eye worms) Bacteria: Moraxella bovis (New Forest Disease) |
| Ixodes ricinus can transmit which pathogens? | Babesia divergens (Red water) Anaplasma (Tick-borne fever) Flavivirus (Louping ill) Borrelia burgdorferi (Lyme disease) |
| List the characteristics of the Argas genus of ticks which are different from Ixodes | Soft 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 |
| Which species of tick transmits both types of equine babesiosis? | Dermacentor reticulatus |
| Which type of babesia, small or large, is Babesia canis? | Large, pathogenic |
| For Babesia spp, in which host does the sexual reproduction take place? | The tick |
| Which 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) |
| What 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 |
| Treatment for babesiosis? | Imidocarb |
| The 3 main species of Theileria and their hosts? | T. annulata - Cattle T. parva - Cattle T. lestoquardi - Sheep/Goats |
| What 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 |
| Name the vector for Ehrlichia ruminantum | The 3-host ornate hard tick Amblyomma |
| List the measures of control of tick borne disease | Immunity (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) |
| Clinical symptoms of Nagana? | Muscle wasting Anaemia Reduced milk production |
| Trypanosoma transmission vector? | Tsetse fly T. vivax also other biting flies |
| Which Trypanosoma species has no sexual reproduction? | T. vivax |
| Why 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 |
| List the control measures against Trypanosoma | Trypanocidal drugs Tsetse insecticides/traps/sterile male release Breeding of trypano-tolerant cattle |
| HAT - clinical signs? | Organomegaly Cardiac GI Neurologic (coma and death if untreated) |
| How is Trypanosoma evansi transmitted? | Via coitus (in horses) |
| Treatment against Neospora caninum in dogs? | Clindamycin |
| Describe the life cycle of Sarcocystis | FH 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 |
| What drug(s) would you use for treating sheep scab (Psoroptes ovis)? | Injectible Moxidectin, Ivermectin or Doramectin Organophosphate dipping (Diazinon) |
| Psoroptes ovis life cycle? | Female lay eggs (1-5 per day) Larvae Protonymph Deutonymph, male female attachment Adults Eggs 11-14 days |
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