Streptococcus iniae in gilthead seabream (Sparus aurata, L.) and red porgy (Pagrus pagrus, L.): ultrastructural analysis.
Streptococcosis caused by Streptococcus iniae has become one of the most serious marine and freshwater aquatic diseases in the past decade, causing large losses in farmed and wild fish worldwide. In this study, we performed an ultrastructural study of major lesions in gilthead seabream Sparus aurata and red porgy Pagrus pagrus experimentally infected with the S. iniae IUSA-1 strain, isolated in a natural outbreak in Spain in the mentioned species. The transmission electron micrographs revealed the resistance of this pathogen inside the phagosome, indicating that the macrophage may provide a significant bacterial reservoir for continuing infection, disease dissemination, and tissue injury by crossing the blood-brain barrier.
Institute of Animal Health (IUSA), University of Las Palmas de Gran Canaria, Arucas, Las Palmas, Spain.
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Aamri
Institute of Animal Health (IUSA), University of Las Palmas de Gran Canaria, Arucas, Las Palmas, Spain.
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MJ
Caballero
Institute of Animal Health (IUSA), University of Las Palmas de Gran Canaria, Arucas, Las Palmas, Spain.
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F
Real
Institute of Animal Health (IUSA), University of Las Palmas de Gran Canaria, Arucas, Las Palmas, Spain.
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Acosta
Institute of Animal Health (IUSA), University of Las Palmas de Gran Canaria, Arucas, Las Palmas, Spain.
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Déniz
Institute of Animal Health (IUSA), University of Las Palmas de Gran Canaria, Arucas, Las Palmas, Spain.
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Román
Institute of Animal Health (IUSA), University of Las Palmas de Gran Canaria, Arucas, Las Palmas, Spain dpadilla@dpat.ulpgc.es.
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Padilla
D000818:Animals; D005393:Fish Diseases / Q000382:microbiology / Q000473:pathology*; D005399:Fishes; D046529:Microscopy, Electron, Transmission / Q000662:veterinary; D021541:Sea Bream; D013030:Spain; D013290:Streptococcal Infections / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D013291:Streptococcus / Q000302:isolation & purification*
Streptococcus iniae; red porgy; seabream; transmission electron micrographs; ultrastructural study