“…Psittacosis/ornithosis virus is found naturally in many birds including parrots, parakeets, budgerigars, turkeys, ducks and chickens (Table 4). Many town pigeons in the U. K. carry these agents (Andrewes & Mills, 1943;Duncan, Thomas & Tobin, 1952). When infected with a member of this group, birds tend to harbour the agent and may excrete it in their droppings, although thems~lves appearing quite healthy.…”