Coccidia

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• Besnoitia bennetti in larynx of horses
• Hepatozoon americanum and subclinical H. canis in periosteal bone formation
  • Both are Tick borne diseases
    • H. canis – Rhipicephalus sanguineus
    • Ticks become infected by ingesting a blood meal containing macrophages and neutrophils infected with the parasite gamonts -> sexual replication in the gut of the tick -> oocysts containing infective sporozoites -> dogs ingest the tick  schizogony occurs in numerous tissues.