A filamentous virus approximately 775 nm long was isolated from variegated plants of the tropical forage grass Brachiaria spp. collected in Colombia and Brazil, South America. Ultrathin sections of symptomatic leaf tissue showed cylindrical inclusions (scrolls) in the cytoplasm of infected cells....
Morales, Francisco José
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Castaño, M.
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Velasco, Ana Cecilia
,
Arroyave, José A.
,
[Detection of a potyvirus related to guineagrass mosaic virus infecting Brachiaria spp. in South America]
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Detection of a potyvirus related to guineagrass mosaic virus infecting Brachiaria spp. in South America
An in vitro infectivity assay was used to examine five cryoprotectants for their suitability of preserving Theileria parva sporozoites. All five were capable of preserving T. parva sporozoites through freezing, the optimal concentrations being 7.5 percent for glycerol, 5 percent for dimethyl sulp...
Kimbita, E.N.
,
Silayo, R.S.
,
Jolan, T.T.
,
[Comparison of cryoprotectants in the preservation of Theileria parva sporozoites using in vitro infectivity assay]
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Comparison of cryoprotectants in the preservation of Theileria parva sporozoites using in vitro infectivity assay
The effects of holding temperature, pH and medium on the infectivity of Theileria parva sporozoites were investigated using an in vitro infectivity assay. The sporozoite infectivity lasted for 72 h at a holding temperature of 4 C but for only 24 h at 24 degrees C. Sporozoite infectivity was fo...
Kimbita, E.N.
,
Silayo, R.S.
,
Dolan, T.T.
,
[Theileria parva: In vitro studies on the effects of holding temperature, PH and medium on sporozoite infectivity]
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Theileria parva: In vitro studies on the effects of holding temperature, PH and medium on sporozoite infectivity
Theileria parva has been shown to infect and transform B cells and T cells at similar frequencies in vitro. However, the majority of parasitized cells in the tissues of infected cattle are alpha/beta T cells. The aim of this study was to determine whether the cell type infected with T. parva infl...
Morrison, W. Ivan
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MacHugh, Niall D.
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Lalor, P.A.
,
[Pathogenicity of Theileria parva is influenced by the host cell type infected by the parasite]
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Pathogenicity of Theileria parva is influenced by the host cell type infected by the parasite
Kaminsky, R.
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Gumm, I.D.
,
Chuma, Francis
,
Zweygarth, E.
,
[A drug incubation infectivity test (DIIT) for assessing resistance to trypanosomes]
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A drug incubation infectivity test (DIIT) for assessing resistance to trypanosomes
Four Trypanosoma (T.) congolense reference clones with known isometamidium sensitivity and 16 T. congolense stocks from cattle in Kenedougou in south-western Burkina Faso, an area with known history of drug resistance, were characterised with the standard mouse test (SMT) and the drug incubatio...
Knoppe, T.N.
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Bauer, B.
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McDermott, John J.
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Peregrine, A.S.
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Mehlitz, D.
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Clausen, P.H.
,
[Isometamidium sensitivity of Trypanosoma congolense stocks from cattle in West Africa tested in mice and the drug incubation infectivity test]
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Isometamidium sensitivity of Trypanosoma congolense stocks from cattle in West Africa tested in mice and the drug incubation infectivity test
Al Saqur, I.
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Armour, J.
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Bairden, K.
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Dunn, A.M.
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Jennings, F.W.
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Murray, M.
,
[Observations on the infectivity and pathogenicity of three isolates of ostertagia spp sens lato in calves]
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Observations on the infectivity and pathogenicity of three isolates of ostertagia spp sens lato in calves
Aphids are regarded as important pest problems of vegetable crops worldwide. Most vegetable growers in sub-Saharan Africa heavily rely on synthetic chemical insecticides for aphids’ control. Fungus-based biopesticides are being considered as alternatives to chemical insecticides. This study evalu...
Bayissa, W.
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Ekesi, S.
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Mohamed, S.A.
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Kaaya, G.P.
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Wagacha, J.M.
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Hanna, R.
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Maniania, N.K.
,
[Selection of fungal isolates for virulence against three aphid pest species of crucifers and okra]
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Selection of fungal isolates for virulence against three aphid pest species of crucifers and okra
The present work aims to assess the pathogenicity of the conidia of six isolates of Metarhizium anisopliae and two isolates of Beauveria bassiana on Helicoverpa armigera in order to select the most promising ones for developing a microbiological product to be used in cotton fields. The pathogenic...
Douro-Kpindou, O.K.
,
Djegui, D.A.
,
Glitho, I.A.
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Tamo, M.
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[Sensitivity of Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidea) to the Entomopathogenic fungi, Metarhizium anisopliae and Beauveria bassiana in laboratory.]
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Sensitivity of Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidea) to the Entomopathogenic fungi, Metarhizium anisopliae and Beauveria bassiana in laboratory.
Pseudocercospora fijiensis, causal agent of the black Sigatoka disease (BSD) of Musa spp., has spread globally since its discovery in Fiji 1963 to all the banana and plantain growing areas across the globe. It is becoming the most damaging and economically important disease of this crop. The iden...
Onyilo, F.
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Tusiime, Geoffrey
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Tripathi, J.N.
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Chen, L.H.
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Falk, B.
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Stergiopoulos, I.
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Tushemereirwe, W.K.
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Kubiriba, J.
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Tripathi, L.
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[Silencing of the mitogen-activated protein kinases (MAPK) fus3 and slt2 in pseudocercospora fijiensis reduces growth and virulence on host plants]
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Silencing of the mitogen-activated protein kinases (MAPK) fus3 and slt2 in pseudocercospora fijiensis reduces growth and virulence on host plants