ABSTRACT
O objetivo deste estudo foi isolar e caracterizar Aeromonas hydrophila, causadora de mortalidade em peixes descrever as alterações histopatológicas provocadas nas brânquias de machos de beta Bettas plendens. Foram utilizados dez peixes que apresentavam característica de alteração de comportamento como anorexia, letalidade e apatia. Amostras de água, muco e brânquias foram inoculadas em meio de cultura Agar sangue a 25ºC por 48 horas. Foi caracterizado A. hidrófila como principal causa do surto de mortalidade. Foram observadas alterações histopatológicas nas brânquias desde fusão lamelar secundária e necrose do tecido. A. hidrophila prejudica o órgão respiratório de forma irreversível, comprometendo as trocas gasosas levando o peixe ao óbito.
The objective of this study was to isolate and characterize Aeromonas hydrophila, a cause of mortality, and to describe the histopathological changes caused in the gills of Bettas plendens. Ten fish presenting change behavior such as anorexia, lethality and apathy were used in this study. Water, mucus and gill samples were inoculated in blood agar culture medium at 25°C for 48 hours. Aeromonas hidrophila was characterized as the main cause of mortality outbreak. Histopathological changes were observed in the gills, from secondary lamellar fusion to tissue necrosis. A. hidrophila irreversibly harms the respiratory organ, compromising the gaseous exchanges, which leads to the death of the fish.
El objetivo de este estudio fue aislar y caracterizar Aeromonas hydrophila, causante de mortalidad en peces, y describir las alteraciones histopatológicas causadas en las branquias de machos de beta Bettas plendens. Se utilizó 10 peces que presentaban características de cambio de comportamiento como anorexia, mortalidad y apatía. Las muestras de agua, moco y branquias fueron inoculadas en medio de cultivo Agar sangre a 25° C durante 48 horas. Fue caracterizado A. hidrófila como principal causa del surto de mortalidad. Se ha observado cambios histopatológicos en las branquias, desde fusión lamelar secundaria y necrosis de los tejidos. A. hidrophila compromete el órgano respiratorio de forma irreversible, comprometiendo los cambios gaseosos y llevando los peces a la muerte.
Subject(s)
Animals , Aeromonas hydrophila/isolation & purification , Fishes/anatomy & histology , Fishes/virology , Histology , Mortality/trends , PathologyABSTRACT
O objetivo deste estudo foi isolar e caracterizar Aeromonas hydrophila, causadora de mortalidade em peixes descrever as alterações histopatológicas provocadas nas brânquias de machos de beta Bettas plendens. Foram utilizados dez peixes que apresentavam característica de alteração de comportamento como anorexia, letalidade e apatia. Amostras de água, muco e brânquias foram inoculadas em meio de cultura Agar sangue a 25ºC por 48 horas. Foi caracterizado A. hidrófila como principal causa do surto de mortalidade. Foram observadas alterações histopatológicas nas brânquias desde fusão lamelar secundária e necrose do tecido. A. hidrophila prejudica o órgão respiratório de forma irreversível, comprometendo as trocas gasosas levando o peixe ao óbito...
The objective of this study was to isolate and characterize Aeromonas hydrophila, a cause of mortality, and to describe the histopathological changes caused in the gills of Bettas plendens. Ten fish presenting change behavior such as anorexia, lethality and apathy were used in this study. Water, mucus and gill samples were inoculated in blood agar culture medium at 25°C for 48 hours. Aeromonas hidrophila was characterized as the main cause of mortality outbreak. Histopathological changes were observed in the gills, from secondary lamellar fusion to tissue necrosis. A. hidrophila irreversibly harms the respiratory organ, compromising the gaseous exchanges, which leads to the death of the fish...
El objetivo de este estudio fue aislar y caracterizar Aeromonas hydrophila, causante de mortalidad en peces, y describir las alteraciones histopatológicas causadas en las branquias de machos de beta Bettas plendens. Se utilizó 10 peces que presentaban características de cambio de comportamiento como anorexia, mortalidad y apatía. Las muestras de agua, moco y branquias fueron inoculadas en medio de cultivo Agar sangre a 25° C durante 48 horas. Fue caracterizado A. hidró- fila como principal causa del surto de mortalidad. Se ha observado cambios histopatológicos en las branquias, desde fusión lamelar secundaria y necrosis de los tejidos. A. hidrophila compromete el órgano respiratorio de forma irreversible, comprometiendo los cambios gaseosos y llevando los peces a la muerte...
Subject(s)
Animals , Aeromonas hydrophila/isolation & purification , Fishes/microbiology , Histology , PathologyABSTRACT
The diagnosis of visceral leishmaniasis (VL) generally requires the use of invasive tests for the collection of infected tissue (aspirates of bone marrow, spleen, liver or lymph nodes). This difficulty has led to the search for safer and less painful techniques to confirm the occurrence of the disease in children. Polymerase chain reaction (PCR) is a method that is advantageous in that it allows the use of peripheral blood samples for diagnosis. This paper reports the utilisation of PCR on peripheral blood samples to diagnose VL in 45 children in Mato Grosso do Sul, Brazil. This technique is compared with methods carried out using tissue collected by invasive procedures, including direct microscopy, culture and detection of Leishmania DNA by PCR in bone marrow aspirates. The results show that PCR of peripheral blood provides great sensitivity (95.6 percent) that is similar to that from the PCR of bone marrow aspirates (91.1 percent) and higher than that achieved with microscopy (80 percent) or culture (26.7 percent) methods. PCR of peripheral blood proved to be a suitable tool for the diagnosis of VL in children because it is highly sensitive and safe, with tissue collection being less invasive than in traditional tests.