Haemoproteus columbae

Haemoproteus columbae : 

Haemoproteus columbae Submitted by P. Mahalingam BVM 06066

Scientific classification : 

Scientific classification Domain: Eukaryota Superphylum:Alveolata Phylum: Apicomplexa Class: Aconoidasida Order: Haemosporida Family: Plasmodiidae Genus: Haemoproteus Species: columbae

GENUS INTRODUCTION : 

GENUS INTRODUCTION Genus created was by Kruse in 1890 Greek : Haima - blood Proteus - a sea god (who had the power of assuming different shapes) Synonyms of Haemoproteus: Halteridium, Haemocystidium Intracellular parasites - erythrocytes Pseudomalaria similarities with Plasmodium species

Haemoproteus columbae : 

Haemoproteus columbae Host : Pigeon (Columba livia), doves. Vector : Pseudolynchia canariensis - louse flies (Hippoboscidae)

Morphology : 

Morphology Gametocyte partially surrounds the cell’s nucleus Multiple, refractile, golden-brown particles of hemozoin pigment.

Pseudolynchia canariensis - louse flies (Hippoboscidae) : 

Pseudolynchia canariensis - louse flies (Hippoboscidae)

Life cycle : 

Life cycle salivary glands of the vector sporozoite Infective stage bites a new host Endothelial cells of blood vessels & lung, liver and spleen asexual reproduction schizonts Numerous merozoites penetration erythrocytes Mature either macrogametocytes or microgametocytes another blood-sucking insect

Life cycle – cond. : 

Life cycle – cond. ingested by another blood-sucking insect sexual reproduction in the midgut of the insect to produce oocysts rupture and release numerous sporozoites invade the salivary gland subsequent infection for another host

Life cycle : 

Life cycle

PATHOGENESIS : 

PATHOGENESIS To produce subclinical infections Enlarged gizzards. Enlargement of the spleen, liver and kidneys May appear chocolate-brown due to hemozoin deposition Infected birds may suffer from reluctance to move, Ruffled appearance, Prostration And Death. Include Parasitemia And anemia. Large megaloschizonts may be present in skeletal muscles, Particularly those of the thighs and back. The average cumulative mortality for flocks experiencing outbreaks may be over 20%.

Diagnosis : 

Diagnosis Peripheral & Cardiac Blood smear examination. Liver & spleen impression smear were stained by Giemsa It shows a typical Halter shaped Gamonts in RBCs PM – Examination

Treatment and Control : 

Treatment and Control Antimalarial drugs - chloroquine may be useful Control : By eliminating the vector population Habitat management Application of insecticides Use of ventilation fans

References : 

References Veterinary protozoology -by Norman D. Levine - 1985 - Technology & Engineering - 414 pages Bowman D: Georgis’ Parasitology for Veterinarians: Eighth Edition. Elsevier Science, St. Louis, MO, 2003. www.nwhc.usgs.gov/publications/field_manual/

Slide 14: 

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