Leishmania Lifecycle (image) Georgia Institute of Technology Share Print E-Mail Caption The life cycle of Leishmania parasites in flies and humans. If passes through promastigote and amastigote phases as it spreads. Credit Centers for Disease Control and Prevention / press and educational handout Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.