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O que é Doença da mancha branca?
Também conhecida como íctio, é uma doença infecciosa de peixes de água doce causada pelo protozoário íctiothyophthirius multifiliis. Acredita-se que todos os peixes carregam o parasita da mancha branca em níveis baixos, mas quando estão sob estresse, o sistema imunológico é sobrecarregado. O peixe pode estar estressado devido à má qualidade da água, baixa temperatura da água, bullying/brigas, superlotação, manuseio/transporte inadequado, etc. O sintoma mais óbvio é o aparecimento de manchas pequenas, brancas e bem definidas no corpo e nas barbatanas. Se não forem tratados, eles se espalharão rapidamente e cobrirão todo o peixe. Outros sintomas da mancha branca incluem o peixe tentando se coçar contra a decoração, perda de apetite / perda de peso, letargia, respiração rápida e barbatanas presas. O protozoário da mancha branca passa por vários estágios em seu ciclo de vida, começando com a fase trofonte onde se enterra na pele do peixe ou no tecido branquial para se alimentar, claramente visível como uma mancha branca (aproximadamente do tamanho de um grão de sal). Neste ponto, o parasita é resistente a medicamentos. Após a alimentação, o trofonte cai e cai no fundo do tanque, entrando em um estágio de divisão encapsulado (tomonte). Uma pequena ferida aberta ficará no peixe e isso traz consigo o risco de infecção secundária. O tomonte adere ao substrato, plantas, madeira, redes ou outra decoração ornamental do aquário. Aqui ele sofre uma série de divisões, produzindo muitas centenas de terontes infecciosos. Uma vez que os terontes são liberados na água, eles procuram um peixe hospedeiro para atacar. Eles então se enterrarão na pele e o ciclo começará novamente. Este ciclo de vida é altamente dependente da temperatura da água e, a 25°C (77°F), o ciclo completo leva aproximadamente 7 dias. Os terontes infecciosos podem sobreviver por cerca de 48 horas se não encontrarem um hospedeiro, e é essa fase que fica vulnerável à medicação. 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-mancha branca. Para garantir que você pegue todos os parasitas durante seu estágio vulnerável, você precisa tratá-los durante todo o ciclo de vida. Devido à natureza da mancha branca, quando você identificar a doença, todos os peixes do tanque terão sido expostos e, portanto, todos precisarão ser tratados. Aumentar lentamente a temperatura da água para cerca de 30oC (adicionar aeração
Sinônimos
Íctio, Doença do Ponto Branco
Nome de termo em inglês
Whitespot disease
Pesquisar mais significados de termos de aquário
