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Results for “Insect Vectors”

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At least 19 recordsLinked to original sources
PubMed1987

Trypanosoma cruzi strain-specific monoclonal antibodies: identification of Colombian strain flagellates in the insect vector.

Spleen cells from mice immunized with insect-derived Trypanosoma cruzi metacyclic trypomastigotes were used to obtain Colombian strain-specific monoclonal antibodies. At least 4 different strain-specific antigens were recognized by the monoclonal antibodies on epimastigotes or metacyclic trypomastigotes. There was no reactivity with other stages of Colombian strain T. cruzi, nor with any stage of 15 other T. cruzi strains or isolates, nor with 22 other Trypanosomatidae. One of the monoclonal antibodies was used to identify, by indirect immunofluorescence, Colombian strain flagellates in cryostat sections or glass-slide smears of the insect vector's intestine.

Animals↗
PubMed1985

Action of isometamidium chloride on the insect vector form of Trypanosoma vivax.

The effect of isometamidium chloride upon developing and mature Trypanosoma vivax occurring in Glossina palpalis palpalis flies was evaluated. Newly emerged G p palpalis flies were infected with T vivax by allowing them to feed on parasitaemic animals. Two experiments were conducted and in each the flies were divided into two groups. One group of infected flies was fed in vitro through a membrane on defibrinated cow blood containing isometamidium chloride at 0.1 mg ml-1, after which they were dissected and examined for trypanosomes, and the other group was fed in the same way on unmedicated blood. The results showed that out of a total number of 129 flies which fed on medicated blood, none was infected, while 55 out of 127 flies which fed on unmedicated blood were infected. The results indicate that isometamidium chloride eliminated the insect vector form of T vivax. These findings are of potential significance in the control of trypanosomiasis in the field, particularly in the operation of the sterile insect technique.

Animals↗
PubMed1985

Wound tumor virus polypeptide synthesis in productive noncytopathic infection of cultured insect vector cells.

Inoculation of the leafhopper cell line AC-20 with wound tumor virus resulted in a productive noncytopathic infection with no detectable alteration of cellular protein synthesis. Virus-specific polypeptide synthesis, detectable by 8 h postinoculation, increased in a linear fashion, reaching a peak (approximately 10 to 15% of total protein synthesis) by 48 h postinoculation. The rate of viral protein synthesis continued at this level for several days but declined, relative to cellular protein synthesis, as infected cells were passaged. By passage 10, the synthesis of viral polypeptides was reduced to a level approximately 5% of that observed at 48 h postinoculation. Viral protein synthesis was not stimulated by superinfection. Viral antigens and infectious virus persisted in the majority (greater than 90%) of cells in an infected culture even after more than 100 passages. The synthesis of wound tumor virus polypeptides in infected insect vector cells appears to be regulated in a coordinated and selective manner.

Animals↗