Psittacosis known serovars. All should be considered to be readily transmissible to humans. "C. psittaci" serovar A is endemic among psittacine birds and has caused sporadic zoonotic disease in humans, other mammals, and tortoises. Serovar B is endemic among pigeons, has been isolated from turkeys, and has also been identified as the cause of abortion in a dairy herd. Serovars C and D are occupational hazards for slaughterhouse workers and for people in contact with birds. Serovar E isolates (known as Cal-10, MP, or MN) have been obtained from a variety of avian hosts worldwide, and although they were associated with
Contagious shooting "[T]he targets turn or the whistle blows, and all the officers shoot together until a cease fire signal is given." O'Donnell partially reinforces this, saying that in classic cases involving contagious shooting, "a gun was shot before any officers fired", and thus "the officers involved began shooting because of fear or because of the sound of a colleague firing". Contagious shooting A contagious shooting is a sociological phenomenon observed in military and police personnel, in which one person firing on a target can induce others to begin shooting. Often the subsequent shooters will not know why they are firing, unless