Avian hematozoa from west-central Bolivia

Area of Science:

• Avian Parasitology
• Wildlife Disease Ecology
• Neotropical Ornithology

Background:

• Avian hematozoa are significant pathogens affecting bird health and populations globally.
• Understanding parasite prevalence in diverse ecosystems like Noel Kempff Mercado National Park is crucial for conservation.
• Previous surveys in the Neotropics show varied hematozoan infection rates across different avifauna.

Purpose of the Study:

• To document the prevalence and diversity of avian hematozoa in Noel Kempff Mercado National Park, Bolivia.
• To establish new host-parasite records and identify bird species examined for blood parasites for the first time.
• To compare hematozoan prevalence in this Bolivian avifauna with other Neotropical and global regions.

Main Methods:

• A total of 641 birds from 135 species and 25 families were captured and examined.
• Blood smears were microscopically analyzed to detect and identify hematozoan parasites.
• New host-parasite associations and parasite-free species were recorded.

Main Results:

• Only 33 birds (5.1%) out of 641 examined harbored blood parasites.
• Microfilariae were the most prevalent hematozoans, followed by Haemoproteus and Plasmodium.
• Thirteen new host-parasite records were established, with 58 species examined for the first time.

Conclusions:

• The study identified a low overall prevalence of avian hematozoa in Noel Kempff Mercado National Park.
• The findings contribute to the knowledge of blood parasite distribution in Neotropical birds.
• Further research is warranted to understand factors influencing this low prevalence compared to other regions.