Porcine reproductive and respiratory syndrome virus. For the Marvel Comics Superhero, see Blue Ear (comics). Porcine reproductive and respiratory syndrome virus (PRRSV) is a virus that causes a disease of pigs, called porcine reproductive and respiratory syndrome (PRRS), also known as blue-ear pig disease (in Chinese, zhÅ« lÃ¡nÄr bÃ¬ng è±¬èè³ç).
Spanish: Enslaved Africans in Mexico, 1537 (PDF) Europeans' enslavement of Native Americans began with Columbus. As the governor of Hispaniola, he forced the Taino Indians to labor in the Spanish fields and mines, and he brought Taino slaves to Spain on his return journeys.
The Spanish introduced African slaves in the Caribbean within 20 years of Columbus' first landing and African slavery was widespread inâ¦ the plantation colonies of all European powers that had them in the Caribbean and Central and South America by the end of the 1500s.