RESUMO

A infestação por metacercárias de Clinostomum sp. nos peixes causa a chamada doença dos pontos amarelos, provocando uma aparência desagradável nos peixes e ocasionando o descarte destes, tanto para fins de consumo quanto para fins ornamentais. O presente trabalho relata a ocorrência de metacercárias deste parasito em Pterophyllum scalare em um estabelecimento comercial de peixes ornamentais de Florianópolis-SC, assim como do parasito adulto em uma ave aquática resgatada no interior do estado de São Paulo. Estes relatos indicam que este parasito também completa seu ciclo de vida em ambientes confinados, havendo necessidade do controle de animais invasores, no caso moluscos e aves, para evitar a proliferação parasitária em ambientes de piscicultura, além de indicar a ampliação de sua distribuição no Brasil. (AU)

Infestation by Clinostomum sp. metacercariae in fish causes the yellow spotted disease, promoting an unpleasant appearance in fish and causing the disposal of these, both for consumption and for ornamental purposes. This paper reports the occurrence of metacercariae of this parasite in Pterophyllum scalare in a commercial establishment of ornamental fish from Florianópolis-SC, as well as the adult parasite in an aquatic bird rescued in the state of São Paulo. These reports also indicate that this parasite completes its life cycle in confined environments, requiring the control of invasive animals, molluscs and birds in case, to avoid parasitic proliferation in fish environments, besides indicating the expansion of its distribution in Brazil. (AU)

Assuntos

RESUMO

A infestação por metacercárias de Clinostomum sp. nos peixes causa a chamada doença dos pontos amarelos, provocando uma aparência desagradável nos peixes e ocasionando o descarte destes, tanto para fins de consumo quanto para fins ornamentais. O presente trabalho relata a ocorrência de metacercárias deste parasito em Pterophyllum scalare em um estabelecimento comercial de peixes ornamentais de Florianópolis-SC, assim como do parasito adulto em uma ave aquática resgatada no interior do estado de São Paulo. Estes relatos indicam que este parasito também completa seu ciclo de vida em ambientes confinados, havendo necessidade do controle de animais invasores, no caso moluscos e aves, para evitar a proliferação parasitária em ambientes de piscicultura, além de indicar a ampliação de sua distribuição no Brasil.

Infestation by Clinostomum sp. metacercariae in fish causes the yellow spotted disease, promoting an unpleasant appearance in fish and causing the disposal of these, both for consumption and for ornamental purposes. This paper reports the occurrence of metacercariae of this parasite in Pterophyllum scalare in a commercial establishment of ornamental fish from Florianópolis-SC, as well as the adult parasite in an aquatic bird rescued in the state of São Paulo. These reports also indicate that this parasite completes its life cycle in confined environments, requiring the control of invasive animals, molluscs and birds in case, to avoid parasitic proliferation in fish environments, besides indicating the expansion of its distribution in Brazil.

Assuntos

RESUMO

The aim of the present study was to detect the alterations of Pseudoplatystoma corruscans parasite infracommunity structure, after the construction of the Porto Primavera dam on the high Paraná River floodplain. The execution of this research was based on 119 host specimens collected between March 2011 and September 2012, and the results were compared to studies performed on periods before the reservoir's construction, when 110 fishes were collected between March 1992 and February 1993. Five parasite species still remain on the environment, despite the environmental modifications: Choanoscolex abscissus, Spasskyelina spinulifera, Nomimoscolex pertierrae, Harriscolex kaparari and Contracaecum sp 2. The Berger-Parker dominance index, calculated to the parasite fauna of 1992, did not show the dominance of any species, while, on the present days, this same index accused the dominance of Nomimoscolex pertierrae (49%) and Choanoscolex abscissus (50%). The present study reports the disappearance of Megathylacus travassosi, Contracaecum sp. 1, Contracaecum sp. 3, Procamallanus (Spirocamallanus) sp. and Cucullanus pseudoplatystomae, suggesting the possibility of a local extinction or a host switch of these species. It has also been registered an Acanthocephala specimen, a genus not observed on this host yet. The results here presented show that the antropic influences on natural systems alter the environmental conditions, what is reflected on the richness and diversity parasite levels.

Assuntos

RESUMO

This study was performed in order to develop a novel approach based on antigen, antibody and immune complex detection by enzyme-linked immunosorbent assay (ELISA) in bronchoalveolar lavage fluid (BALF) samples. For that purpose Wistar rats immunosuppressed or not were experimentally infected with Strongyloides venezuelensis. The microtiter plates were coated with alkaline parasite extract for antibody detection and with IgG anti-S. venezuelensis for antigen and immune complex detection. The immune serum was able to detect 1.56 µg/mL of L3 antigens in BALF samples. ELISA sensitivity was 96.6%, 71.6% and 91.6% for antigen, antibody and immune complex, respectively, and the specificity was 100% for all methods. Antigen detection in BALF samples showed to be a good approach for evaluating the kinetics of infection in non immunosuppressed or immunosuppressed rats. IgG was detected in non immunosuppressed rats from day 8 p.i. and in immunosuppressed rats from day 2 p.i. Moreover, immune complex was detected during the entire kinetic for both groups. In conclusion, association of antigen, antibody and immune complex detection in BALF samples seems to be an alternative approach for early strongyloidiasis diagnosis particularly in immunosuppressed individuals.

Assuntos