Inter-Research > DAO > v152 > p115-125  
Diseases of Aquatic Organisms

via Mailchimp

DAO 152:115-125 (2022)  -  DOI:

Chytrid fungus in amphibians from the lowland Brazilian Amazon

Carolina Lambertini1,#, Julia R. Ernetti1,*,#, Alexandre F. R. Missassi2, Rafael F. Jorge3, Domingos da Silva Leite4, Albertina P. Lima3, Luís Felipe Toledo1

1Laboratório de História Natural de Anfíbios Brasileiros (LaHNAB), Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo 13083-862, Brazil
2Laboratório de Herpetologia, Departamento de Zoologia, Museu Paraense Emílio Goeldi, Belém, Pará 66077-830, Brazil
3Instituto Nacional de Pesquisas da Amazônia, Manaus, Amazonas 69067-375, Brazil
4Departamento de Genética, Evolução, Microbiologia e Imunologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo 13083-862, Brazil
*Corresponding author:
#These authors contributed equally to this article

ABSTRACT: Infectious diseases are one of the main threats to biodiversity. The fungus Batrachochytrium dendrobatidis (Bd) is associated with several amphibian losses around the globe, and environmental conditions may dictate the success of pathogen spread. The Brazilian Amazon has been considered climatically unsuitable for chytrid fungus, but additional information on Bd dynamics in this ecoregion is still lacking. We sampled 462 amphibians (449 anurans, 4 caudatans and 9 caecilians), representing 57 species from the Brazilian Amazon, and quantified Bd infections using qPCR. We tested whether abiotic variables predicted the risk of Bd infections, and tested for relationships between biotic variables and Bd. Finally, we experimentally tested the effects of Bd strains CLFT 156 and CLFT 102 (from the southern and northern Atlantic Forest, respectively) on Atelopus manauensis. We detected higher Bd prevalence than those previously reported for the Brazilian Amazon, and positive individuals in all 3 orders of amphibians sampled. Both biotic and abiotic predictors were related to prevalence, and no variable explained infection load. Moreover, we detected higher Bd prevalence in forested than open areas, while the host’s reproductive biology was not a factor. We detected higher mortality in the experimental group infected with CLFT 156, probably because this strain was isolated from a region characterized by discrepant climatic conditions (latitudinally more distant) when compared with the host’s sampling site in Amazon. The lowland Brazilian Amazon is still underexplored and future studies targeting all amphibian orders are essential to better understand Bd infection dynamics in this region.

KEY WORDS: Batrachochytrium dendrobatidis · Tropical forest · Disease ecology · Environmental variables · Anura · Gymnophiona · Caudata

Full text in pdf format
Supplementary material
Cite this article as: Lambertini C, Ernetti JR, Missassi AFR, Jorge RF, da Silva Leite D, Lima AP, Toledo LF (2022) Chytrid fungus in amphibians from the lowland Brazilian Amazon. Dis Aquat Org 152:115-125.

Export citation
Share:    Facebook - - linkedIn

 Previous article Next article