vector-borne protozoa Flashcards
What is the vector of leishmania?
Phlebotomine sand fly
What are the forms of leishmania disease?
Visceral
Cutaneous
Mucocutaneous
What are the clinical signs of leishmania?
Anorexia Skin lesions Ocular abnormalities Epistaxis Lethargy
What is the pathology of leishmania
Anaemia
Thrombocytopenia
Hyperglobinuria
How can leishmania be diagnosed?
Cytology of lymph nodes, PCR, serology
What is the vector for trypanosoma?
Tsetse fly
What disease is caused in cattle by trypanosoma?
Anaemia - trypanosoma congolese
What disease is caused in humans by trypanosoma?
Sleeping sickness
What is the general life cycle of babesia?
Sporozoites penetrate RBC.
Ingested by tick vector when taking a blood feed.
Forms zygotes in the tick gut.
Sporozoites released in tick saliva.
What parasite transmits babesia?
Ticks
Which species of tick transmits babesia (canis) canis?
Dermacentor reticulatis
Which species of tick transmits babesia (canis) vogeli?
Dermacentor reticulatis
Which species of tick transmits babesia gibsoni?
Rhipicephalus sanguineas
Which species of tick transmits babesia vulpes?
Ixodes hexagonus - little evidence though.
Possible reservoir in foxes.
What is the pathogenesis of babesia canis?
Rapid division of parasites within erythrocytes.
Haemolytic anaemia.
Splenomegaly -> enlarged spleen
What are the clinical signs of babesia canis infection?
Fever
Haemoglobinuria
Jaundice
Anaemia
What is the vector for babesia divergens?
Ixodes ricinus
What is the disease caused in cattle by babesia divergens?
Red water fever
What are the clinical signs of a babesia divergens infection?
Depression, pyrexia, anorexia
Anaemia, haemoglobinuria, icterus
Diarrhoea or constipation
What is the epidemiology of babesia divergens?
Associated with peaks of tick feeding activity.
Disease of older animals.
Enzootic stability - high challenge, low risk of disease.
What are the risk factors associated with babesia divergens?
Introducing naive cattle to an infected herd.
Introducing an infected individual to a naive herd.
Number of ticks.