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Diseases of Aquatic Organisms

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DAO 129:117-122 (2018)  -  DOI: https://doi.org/10.3354/dao03236

Histopathological alterations in gills of Amazonian shrimp Macrobrachium amazonicum parasitized by isopod Probopyrus bithynis (Bopyridae)

Lincoln Lima Corrêa1,*, Elen Monique Oliveira Sousa1, Lenise Vargas Flores Silva1, Edson Aparecido Adriano2,3, Marcos Sidney Brito Oliveira4, Marcos Tavares-Dias4,5

1Universidade Federal do Oeste do Pará - UFOPA, Instituto de Ciências e Tecnologia das Águas - ICTA, Av. Mendonça Furtado, no. 2946, Fátima, CEP 68040-470, Santarém, PA, Brazil
2Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Paulo (Unifesp), Rua Professor Artur Riedel, 275, Jardim Eldorado, CEP 09972-270, Diadema, SP, Brazil
3Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Caixa Postal 6109, CEP 13083-970 Campinas, SP, Brazil
4Programa de Pós-Graduação em Biodiversidade Tropical, Universidade Federal do Amapá (UNIFAP), Rodovia Juscelino Kubitschek S/N, Universidade, 68903-419, Macapá, Amapá, Brazil
5Embrapa Amapá, Rodovia Juscelino Kubitschek, Km 5, no. 2600, Universidade, CEP 68903-419, Macapá, AP, Brazil
*Corresponding author:

ABSTRACT: The present study describes, for the first time, histopathological alterations in the gills of Macrobrachium amazonicum caused by infestation of Probopyrus bithynis (Isopoda: Bopyridae). In every case (100%), the infestation by P. bithynis was by a single pair of parasites (male and female) and occurred in the right or left side of the branchial chamber; the gill structures were visibly compressed due to the presence of parasites. The gills of M. amazonicum parasitized by P. bithynis exhibited a chronic inflammatory response, with the presence of edema, greater quantities of hemocytes, necrosis, epithelial cell hyperplasia, rupture of the pillar cells at the ends of the gill lamellae, desquamation of the cuticle, lamellar fusion and rupture of the lamellar epithelium. Tissue lesions were found in the histological sections of the gills of the parasitized M. amazonicum. Structural alterations in the branchial chamber of the hosts caused by the presence of P. bithynis can lead to physiological changes that can impair host respiratory performance. Finally, histopathological alterations in the branchial chamber of hosts suggest that P. bithynis feed directly on the gill tissues of this shrimp.


KEY WORDS: Gills · Morphology · Isopod · Parasite · Freshwater shrimp · Palaemonidae · Amazon River · Brazil


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Cite this article as: Corrêa LL, Oliveira Sousa EM, Flores Silva LV, Adriano EA, Brito Oliveira MS, Tavares-Dias M (2018) Histopathological alterations in gills of Amazonian shrimp Macrobrachium amazonicum parasitized by isopod Probopyrus bithynis (Bopyridae). Dis Aquat Org 129:117-122. https://doi.org/10.3354/dao03236

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