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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
01/08/1995 |
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Data da última atualização: |
01/08/1995 |
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Autoria: |
TELFORD JUNIOR, S. R. |
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Título: |
Intralymphocytic schizonts associated with an initial infection of Saurocytozoon tupinanbi in Tupinambis teguixin. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
International Journal of Parasitology, v.8, p.133-138, 1978. |
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Idioma: |
Inglês |
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Conteúdo: |
An initial natural infection of saurocytozoon tupinambi in a juvenile Tupinambis teguixin from Venezuela was studied for 131 days following capture of the host. intralymphocytic parasites appeared in this sequence: small uninucleate and binucleate stages (days 1-31 and again on day 41); schizonts with 3-102 nuclei (days 9-14 and 29-35); immature gametocytes (days 29-35) and apparently mature gametocytes of Saurocytozoon tupinambi from day 41. maximum parasitemia of trophozoites and binucleate schizonts occurredf on day 4 when 11% of lymphocytes were infected. maximum parasitemia by larger schizonts occurred on day 8 at 0.13% of lymphocytes, while maximum gametocytemia was found on day 49 with 16-4% of lymphocytes parasitized. Two types of schizonts were observed: intralymphocytic and the same type free of host cells, and fragments of varying size which may have been torn from capillary endothelium. Due to presence of cocncurrent infection by a small Plasmodium species, identity of intralymphocytic asexual stages with S. tupinambi cannot be established. Presenced of asexual stages in the same type of host cells (lymphocytes and close derivatives), sequential appearance of trophozoites, schizonts and gametocytes over a period of 40 days, and correlated fluctuations in lymphocyte density suggest they are conspecific, and that saurocytozoon, which has a plamodiid type of sporogony may prove to further differ from leucocytozoids by presence of an asexual cycle in circulating blood cells. MenosAn initial natural infection of saurocytozoon tupinambi in a juvenile Tupinambis teguixin from Venezuela was studied for 131 days following capture of the host. intralymphocytic parasites appeared in this sequence: small uninucleate and binucleate stages (days 1-31 and again on day 41); schizonts with 3-102 nuclei (days 9-14 and 29-35); immature gametocytes (days 29-35) and apparently mature gametocytes of Saurocytozoon tupinambi from day 41. maximum parasitemia of trophozoites and binucleate schizonts occurredf on day 4 when 11% of lymphocytes were infected. maximum parasitemia by larger schizonts occurred on day 8 at 0.13% of lymphocytes, while maximum gametocytemia was found on day 49 with 16-4% of lymphocytes parasitized. Two types of schizonts were observed: intralymphocytic and the same type free of host cells, and fragments of varying size which may have been torn from capillary endothelium. Due to presence of cocncurrent infection by a small Plasmodium species, identity of intralymphocytic asexual stages with S. tupinambi cannot be established. Presenced of asexual stages in the same type of host cells (lymphocytes and close derivatives), sequential appearance of trophozoites, schizonts and gametocytes over a period of 40 days, and correlated fluctuations in lymphocyte density suggest they are conspecific, and that saurocytozoon, which has a plamodiid type of sporogony may prove to further differ from leucocytozoids by presence of an asexual cycle in circulating bloo... Mostrar Tudo |
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Palavras-Chave: |
Asexual stages; Historia de vida; Host; Infeccao inicial; Initial infection; Lymphocyte; Parasita; Parasite; Plamodium; Reptile; Saurocytozoon tupinambi; Tupinambis teguixin. |
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Thesagro: |
Hospedeiro; Lagarto; Linfócito; Réptil. |
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Thesaurus Nal: |
gametocytes; life history; schizonts; Venezuela. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02479naa a2200361 a 4500
001 1785190
005 1995-08-01
008 1978 bl --- 0-- u #d
100 1 $aTELFORD JUNIOR, S. R.
245 $aIntralymphocytic schizonts associated with an initial infection of Saurocytozoon tupinanbi in Tupinambis teguixin.
260 $c1978
520 $aAn initial natural infection of saurocytozoon tupinambi in a juvenile Tupinambis teguixin from Venezuela was studied for 131 days following capture of the host. intralymphocytic parasites appeared in this sequence: small uninucleate and binucleate stages (days 1-31 and again on day 41); schizonts with 3-102 nuclei (days 9-14 and 29-35); immature gametocytes (days 29-35) and apparently mature gametocytes of Saurocytozoon tupinambi from day 41. maximum parasitemia of trophozoites and binucleate schizonts occurredf on day 4 when 11% of lymphocytes were infected. maximum parasitemia by larger schizonts occurred on day 8 at 0.13% of lymphocytes, while maximum gametocytemia was found on day 49 with 16-4% of lymphocytes parasitized. Two types of schizonts were observed: intralymphocytic and the same type free of host cells, and fragments of varying size which may have been torn from capillary endothelium. Due to presence of cocncurrent infection by a small Plasmodium species, identity of intralymphocytic asexual stages with S. tupinambi cannot be established. Presenced of asexual stages in the same type of host cells (lymphocytes and close derivatives), sequential appearance of trophozoites, schizonts and gametocytes over a period of 40 days, and correlated fluctuations in lymphocyte density suggest they are conspecific, and that saurocytozoon, which has a plamodiid type of sporogony may prove to further differ from leucocytozoids by presence of an asexual cycle in circulating blood cells.
650 $agametocytes
650 $alife history
650 $aschizonts
650 $aVenezuela
650 $aHospedeiro
650 $aLagarto
650 $aLinfócito
650 $aRéptil
653 $aAsexual stages
653 $aHistoria de vida
653 $aHost
653 $aInfeccao inicial
653 $aInitial infection
653 $aLymphocyte
653 $aParasita
653 $aParasite
653 $aPlamodium
653 $aReptile
653 $aSaurocytozoon tupinambi
653 $aTupinambis teguixin
773 $tInternational Journal of Parasitology$gv.8, p.133-138, 1978.
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Embrapa Pantanal (CPAP) |
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