First report of predation of Giardia sp cysts by ciliated protozoa and confirmation of predation of Cryptosporidium spp. oocysts by ciliate species

Autor(es)

Vidal Siqueira-Castro, Isabel Cristina ^{[1, 2]} ; Greinert-Goulart, Juliane Araujo ^{[1, 3]} ; Bonatti, Tais Rondello ^[1] ; Yamashiro, Sandra ^[1] ; Bueno Franco, Regina Maura ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Protozool Lab, Inst Biol, Campinas, SP - Brazil

^[2] Cidade Univ Zeferino Vaz Rua, Rua Monteiro Lobato 255, BR-13083862 Campinas, SP - Brazil

^[3] Reg Univ Blumenau FURB, Parasitol Lab, Blumenau, SC - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Environmental Science and Pollution Research; v. 23, n. 11, p. 11357-11362, JUN 2016.
• Citações Web of Science: 4

Resumo

Ciliated protozoa are important components of the microbial food web in various habitats, especially aquatic environments. These organisms are useful bioindicators for both environmental quality assessment and the wastewater purification process. The pathogenic parasitic protozoan species Giardia and Cryptosporidium represent a significant concern for human health, being responsible for numerous disease outbreaks worldwide. The predation of cysts and oocysts in 15 ciliate species from water and sewage samples collected in Campinas, So Paulo, Brazil were verified under laboratory conditions. The ciliated protozoan species were selected based on their mode of nutrition, and only bacterivorous and suspension-feeders were considered for the experiments. The species Blepharisma sinuosum, Euplotes aediculatus, Sterkiella cavicola, Oxytricha granulifera, Vorticella infusionum, Spirostomum minus, and Stentor coeruleus ingested cysts and oocysts, the resistance forms of Giardia spp. and Cryptosporidium spp., respectively. This is the first time that the ingestion of Giardia cysts by ciliated protozoa has been reported. These findings may contribute to a better understanding of the biological removal of these pathogens from aquatic environments. (AU)

• Processo FAPESP: 10/16222-4 - Ciliatofauna, cistos de Giardia spp. e oocistos de Cryptosporidium spp. no lodo ativado de uma estação de tratamento de esgoto: instrumentos de avaliação e controle do processo
• Beneficiário: Regina Maura Bueno Franco
• Modalidade de apoio: Auxílio à Pesquisa - Regular