New occurrence of <i>Kudoa orbicularis</i> parasitizing the freshwater catfish <i>Trachelyopterus galeatus</i> (Siluriformes: Auchenipteridae) in the Brazlian Amazon region

Santos, Weverton John Pinheiro dos; Silva, Diehgo Tuloza da; Santos, Patrícia de Fátima Saco dos; Matos, Edilson Rodrigues; Hamoy, Igor Guerreiro

doi:10.1590/S1984-29612019047

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Original Article • Rev. Bras. Parasitol. Vet. 28 (3) • Jul-Sep 2019 • https://doi.org/10.1590/S1984-29612019047 linkcopy

New occurrence of Kudoa orbicularis parasitizing the freshwater catfish Trachelyopterus galeatus (Siluriformes: Auchenipteridae) in the Brazlian Amazon region

Nova ocorrência de Kudoa orbicularis parasitando peixe de água doce Trachelyopterus galeatus (Siluriformes: Auchenipteridae) na região Amazônica brasileira

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The aim of this was describe an infection by Kudoa orbicularis in freshwater catfish Trachelyopterus galeatus. A sample of 80 specimens of T. galeatus was collected in the municipality of Cachoeira do Arari, Marajó Island, in the state of Pará, Brazil. Pseudocysts were found in the muscle fibers of the epaxial and hypaxial regions of 85.0% of the specimens analyzed, reflecting a high infection rate. The pseudocysts contained spores that were pseudo-square in shape, with a mean length of 4.65 µm (range: 4.04–5.54) and mean width of 1.53 µm (1.56–1.74). Analyses on the morphology of the spores and a partial 934-bp sequence of the SSU rDNA gene confirmed that the microparasite was Kudoa orbicularis. This is the second record of this microparasite in a siluriform host in the Brazilian Amazon region.

Keywords: Freshwater fish; infection; molecular biology; Myxozoa; microparasite

Species	Host	Site of infection	Spore morphology	Spore length	Spore width	PC length	PC width	Locality	Reference
Kudoa orbicularis	Trachelyopterus galeatus	Muscle	Pseudo-square	4.65 (4.04-5.54)	5.25 (4.78-5.98)	2.22 (2.05-2.32)	1.53 (1.56-1.74)	Brazil	Present study
Kudoa orbicularis	Chaetobranchopsis orbicularis	Muscle	Pseudo-square	4.4-4.8	5.0-5.6	1.4-2.0	1.2-1.6	Brazil	Sindeaux-Neto et al. (2017)
Kudoa orbicularis	Chaetobranchopsis orbicularis	Muscle	Rounded square	4.3 (3.6-5.0)	5.1 (4.2-5.8)	2.1 (1.7-2.6)	1.3 (0.9-1.7)	Brazil	Azevedo et al. (2016)
Kudoa amazonica	Hypophthalmus marginatus	Esophageal musculature	Rounded square	5.6 (5.0-5.9)	6.7 (6.3-7.4)	1.8	1.2	Brazil	Velasco et al. (2019)
Kudoa pleurogrammi	Pleurogrammus monopterygius	Muscle	Sub-square	6.3 (5.6-8.8)	8.6 (8.2-9.1)	2.8 (2.7-2.8)	1.6 (1.4-2.0)	USA	Kasai et al. 2016
Kudoa inornata	Cynoscion nebulosus	Skeletal muscles	Rounded square	5.4 (5.3-5.5)	5.9 (5.8-6.0)	2.7	-	USA	Dyková et al. (2009)
Kudoa islandica	Cyclopterus lumpus	Skeletal muscles	Rounded square	4.8 (4.1-5.1)	7.4 (6.5-8.6)	1.7 (1.4-1.9)	1.5 (1.2-1.8)	Iceland	Kristmundsson & Freeman (2014).
Kudoa ogawai	Hyperoglyphe japonica	muscle tissue	Pseudo-square	8.93 (8.3-9.6)	13.29 (12.0-14.2)	2.45 (1.9-3.2)	2.48 (1.7-3.0)	Japan	Yokoyama et al. (2012)
Kudoa aequidens	Aequidens plagiozonatus	Sub-opercular Musculature	Square or pseudo-square	3.2 (2.9-3.5)	6.8 (6.2-7.1)	2.2 (2.0-2.6)	1.2 (1.1-1.5)	Brazil	Casal et al. (2008)

Species	1	2	3	4	5	6	7	8	9
(1) Kudoa orbicularis (XX006660)	-
(2) Kudoa orbicularis (KM192365)	0.0348	-
(3) Kudoa amazonica (MK129260)	0.0474	0.0291	-
(4) Kudoa megacapsula (AB188529)	0.0497	0.0428	0.0720	-
(5) Kudoa thyrsites (AY542482)	0.0509	0.0416	0.0720	0.0111	-
(6) Kudoa akihitoi (LC190924)	0.0567	0.0497	0.0791	0.0246	0.0246	-
(7) Kudoa whippsi (JX090293)	0.0602	0.0555	0.0803	0.0268	0.0291	0.0246	-
(8) Kudoa lateolabraci (AB844442)	0.0520	0.0461	0.0744	0.0178	0.0200	0.0291	0.0212	-
(9) Kudoa empressmichikoae (LC190927)	0.0602	0.0463	0.0732	0.0234	0.0212	0.0257	0.0280	0.0212	-

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