02099naa a2200253 a 450000100080000000500110000800800410001902400550006010000210011524501680013626000090030452012780031365000190159165000200161065000240163065000130165465000240166765000130169165300130170470000230171770000210174070000190176177300650178020867652022-10-18 2018 bl uuuu u00u1 u #d7 ahttps://doi.org/10.1080/10454438.2017.14064202DOI1 aRODRIGUES, R. N. aFirst record of infection by Trypanosoma sp. of Colossoma macropomum (Serrasalmidae), a neotropical fish cultivated in the Brazilian Amazon.h[electronic resource] c2018 aFish farming has grown rapidly in Brazil over the last two decades, due in part to the availability of water and species with potential for cultivation, such as Colossoma macropomum. This farmed fish, however, can be affected by parasitic infections with high mortality rates (>35%). The main objective of the present study was to describe the first occurrence of the Trypanosoma species in Colossoma macropomum, which occurred in fish cultured in the Brazilian Amazon region, as well as to morphologically characterize the trypomastigotes and the impact of these hemoparasites on the body condition of the hosts. The trypanosomes found in the blood of Colossoma macropomum were morphologically characterized by the size of the trypomastigote form, indicating the presence of only one morphotype. Of the 39 hosts examined from one fish farming, 41.0% were infected by Trypanosoma sp., with low levels of infection (mean blood density of 3.7/?L). The condition factor of the asymptomatic hosts was not affected by hemoparasitism. There was no correlation between the abundance of Trypanosoma sp. and the condition factor and size of the hosts. Finally, our understanding of host-parasite interactions and the detection of emerging diseases are fundamental for aquaculture. aBody condition aFreshwater fish aCondição corporal aParasito aPeixe de água doce aTambaqui aParasite1 aOLIVEIRA, M. S. B.1 aTAVARES-DIAS, M.1 aCORRÊA, L. L. tJournal of Applied Aquaculturegv. 30, n. 1, p. 29-38, 2018.