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O que é Doença de veludo?
Uma doença infecciosa causada por dinoflagelados protozoários, especificamente Oodinium em peixes de água doce e Amyloodinium em peixes marinhos, e é comumente causada pela exposição a más condições da água (amônia/nitrito elevados), estresse de transporte ou contaminação. Poucas horas após a infecção, a taxa respiratória do peixe aumenta drasticamente e, se não for tratada nesta fase, minúsculos cistos acinzentados ou enferrujados aparecem em todo o corpo e nadadeiras em grande número, dando ao peixe uma aparência aveludada. Esses cistos nem sempre são óbvios, a menos que o peixe seja visto de frente com a fonte de luz atrás dele. Às vezes, pode ser confundido com a doença da mancha branca, mas as manchas causadas pela doença de veludo são muito, muito menores (além disso, a doença da mancha branca não apresenta dificuldade respiratória até que vários dias sem tratamento tenham se passado). Outros sintomas de veludo incluem o peixe tentando se arranhar contra a decoração, perda de apetite / perda de peso, letargia e barbatanas presas. O parasita encontra um peixe e adere a ele usando seu flagelo (uma estrutura fina semelhante a um cabelo que permite que os protozoários nadem). Em seguida, penetra na pele e nos tecidos moles das guelras, destruindo as células e alimentando-se dos nutrientes internos. Depois que o parasita amadurece, ele cai do peixe e se divide em mais dezenas de parasitas que procuram hospedeiros, e o ciclo se repete. Esta doença é altamente contagiosa e muitas vezes fatal se não for detectada e tratada a tempo. Se seus peixes estiverem infectados, sugerimos uma grande troca parcial de água e tratamento imediato com um medicamento anti-veludo. Também conhecida como doença do pó de ouro ou Oodinium/Oodiniasis.
Sinônimos
Oodiniose, Doença do pó de ouro
Nome de termo em inglês
Velvet disease
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