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O que é Columnaris?
É uma doença que resulta de uma infecção causada pela bactéria Gram-negativa aeróbica Flavobacterium (Flexibacter) columnare. A bactéria é predominante nos meses mais quentes do verão e tende a ser abundante em aquários onde existem altas cargas biológicas, onde há superlotação estressante, onde pode haver baixos níveis de oxigênio dissolvido ou em sistemas com baixa qualidade geral da água; as bactérias geralmente entram nos peixes através das brânquias, boca ou pequenas feridas. A doença é altamente contagiosa e se espalha facilmente por meio de equipamentos contaminados; por esta razão, é uma boa ideia usar equipamentos separados para cada aquário ao realizar a manutenção para evitar a propagação da doença. Columnaris é comumente confundido com uma infecção fúngica por causa do aparecimento dos sintomas externos, lesões branco-acinzentadas no corpo, barbatanas e brânquias que podem ter uma aparência de 'fungo'. As lesões geralmente aparecem primeiro na cabeça e na barbatana caudal, e podem ser vistas inicialmente apenas como áreas mais pálidas que não têm a aparência normal do resto do peixe, juntamente com algum desgaste nas barbatanas. Em infestações muito pesadas, as lesões podem ter a aparência de ulcerações de aparência raivosa - muitas vezes na forma de 'selas' - com subsequente perda epidérmica e acúmulo óbvio (e mais tarde, necrose) nos filamentos branquiais, tornando a respiração muito trabalhosa. Não é incomum que o peixe produza excesso de muco quando afetado. O tratamento deve ser dado imediatamente, pois se deixada para se manifestar, a doença pode ser fatal dentro de 48-72 horas, especialmente em peixes mais jovens ou mais fracos. Obtenha um tratamento adequado em sua loja de produtos aquáticos local e adicione a dose apropriada após realizar uma troca parcial de água e remover qualquer carvão ativado do sistema de filtragem. O tempo é muito importante e o tratamento deve ser dado sem pressa. Para evitar que esses problemas ocorram, certifique-se de manter a alta qualidade da água o tempo todo e que os níveis de estoque permaneçam sensíveis. O uso de um tanque de quarentena para novas compras é altamente recomendado.
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Nome de termo em inglês
Columnaris
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