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Babesia canis
''Babesia canis'' is a protozoal parasite which infects red blood cells and can lead to anemia.〔(【引用サイトリンク】title=Babesia Canis )〕 ''Babesia canis'' is transmitted by the brown dog tick (''Rhipicephalus sanguineus'') and is one of the most common piroplasm infections. The brown dog tick is adapted to warmer climate, therefore most infections come from the southern and southeastern United States and from California, especially in shelters and greyhound kennels.〔 ''Babesia canis'' is also predominately in Europe and transmitted by ''Dermacentor'' ticks with an alarming increase in infections due to people traveling with their pets.
== Life cycle ==
"Dogs become infected with ''Babesia canis'' when a tick feeds on the blood and releases sporozoites into the dog's bloodstream. The young ''Babesia'' organisms attach to red blood cells, eventually penetrating and making a new home for themselves within. Inside the red blood cell, the ''Babesia'' organism divests its outer coating and begins to divide, becoming a new form called a “merozoite” which a new tick may ingest during a blood meal." 〔(【引用サイトリンク】title=Babesia Infection in Dogs )〕 "Following ingestion by the tick, ''Babesia'' undergoes sexual reproduction (gamogony) followed by asexual reproduction (often schizogony and always sporogony), resulting in numerous sporozoites (in the tick salivary glands) that are infective to vertebrate hosts." 〔(【引用サイトリンク】url=http://www.capcvet.org/capc-recommendations/canine-babesiosis1/ )〕 Pregnant dogs can give ''Babesia canis'' to their unborn puppies and it is recommended that infected females should not be bred.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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