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Geographical distribution: S. Hadar has been isolated from in the U.S., where it is among the top ten serovars from non-clinical non-human sources. Serovar Hadar has also been reported in Europe where it is 4th most common serovars serovar isolated from humans. In two countries of Asia (Thailand and China) this serovar has been reported. In Thailand serovar Hadar was found in chicken and duck meat. Reports of acquisition of S. Hadar in travelers from Africa suggest distribution of this serovar in Africa.
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