Question

Lymphoid leukosis disease of poultry is caused by

• A. Fungus
• B. Virus
• C. Helminth
• D. Bacterium

Answer 1

The correct option is B Virus

AVL
AVL (Avian leukosis virus) causes tumours or B-lymphoma in poultry livestock. It occurs in chickens when they are sexually mature, approximately 16 weeks of age and older.

Bacteria
Bacteria are unicellular prokaryotic organisms belonging to Kingdom Monera. Gram negative bacteria, Salmonella pullorum causes pullorum disease in poultry.

Fungus
They are multicellular, achlorophyllous, saprophytic organisms depending on the dead and decaying organisms. Candidiasis is a common fungal disease in poultry.

Helminths
Helminths are parasitic worms present in the phylum Platyhelminthes (flukes and tapeworms) and Aschelminthes (roundworms). Roundworm infections are common in poultry.

Final answer
b. Virus.