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| Solari,Alberto J.; Rahn,Monica I.; Saura,Alicia; Lujan,Hugo D.. |
| The fine structure of the binucleate, parasitic protist Giardia lamblia during interphase and divisional stages was studied by serial thin sectioning and three-dimensional reconstructions. The earlier sign of nuclear division is the development of a few peripheral areas of densely packed chromatin directly attached to the inner nuclear envelope. An intracytoplasmic sheet of ventral disk components grows from the cell periphery towards one of the nuclei, apparently constricting this nucleus, which becomes located at a ventral bulge. After the basal bodies become duplicated, a full nuclear division occurs in trophozoites, giving two pairs of parent-daughter nuclei. This full division occurs in a dorsal-ventral direction, with the resulting nuclear pairs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Giardia; Primitive mitosis; Fine structure of mitosis; Protist mitosis; Cell differentiation. |
| Ano: 2003 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452003000300004 |
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| Heller,Léo; Vieira,Maria Berenice Cardoso Martins; Brito,Ludmila Ladeira Alves de; Salvador,Daniella Pedrosa. |
| Currently, a major challenge on producing high-quality drinking water is to monitor pathogens, such as Giardia, Cryptosporidium and enteric viruses. Due to limitations of the analytical methods available to detect pathogens in water, the research of surrogate indicators is an up-to-date subject. In view of these aspects, a pilot scale study was performed to evaluate the association between microbiological and physical indicators and the presence of Giardia spp and Cryptosporidium sp in the effluent of upflow and downflow slow sand filters. The results showed that efficient bacterial removal could indicate suitable protozoa removal. Although coliforms and Escherichia coli do not present the appropriate physiological profile for an "ideal" indicator, they... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cryptosporidium; Giardia; Slow sand filtration; Surrogate; Microbiological indicator. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200029 |
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| Lallo,Maria Anete; Pereira,Adriano; Araújo,Ronalda; Favorito,Sandra Elisa; Bertolla,Patrícia; Bondan,Eduardo Fernandes. |
| A ocorrência de Giardia, Cryptosporidium e microsporídios foi investigada por meio da análise de 98 amostras fecais de animais silvestres capturados em uma área de desmatamento para a construção das barragens de Paraitinga e Biritiba, localizadas nos Municípios de Mogi das Cruzes, Salesópolis e Biritiba-Mirim, no Estado de São Paulo. As amostras foram obtidas de 46 roedores, 21 marsupiais, 16 sapos, nove morcegos, três primatas e três lagartos. As técnicas de centrífugo-flutuação com sulfato de zinco, de Kinyoun e a coloração de Gram-Chromotrope foram utilizadas, respectivamente, para a pesquisa de Giardia, de Cryptosporidium e de microsporídios. O total de animais parasitados por um dos protozoários investigados foi de 17,35% (17/98). Cistos de Giardia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cryptosporidium; Giardia; Mamíferos silvestres; Microsporídios; Protozoários parasitas; Zoonoses. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000500025 |
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