Canadian Journal of Microbiology

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Phenotypic, genotypic, and symbiotic diversities in strains nodulating clover in different soils in Spain
Canadian Journal of Microbiology - Tập 55 Số 10 - Trang 1207-1216 - 2009
Martha-Helena Ramírez-Bahena, Encarna Velázquez, Félix Fernández-Santos, Álvaro Péix, Eustoquio Martínez‐Molina, Pedro F. Mateos
Trifolium species are the most common legumes present in wild Spanish soils; however, there are no studies to date on the diversity of rhizobia nodulating clover in Spain. Twenty strains from different Spanish soils with acidic, neutral, and basic pH were selected to study their genotypic, phenotypic, and symbiotic features. The results showed that the isolates were genotypically diverse,...... hiện toàn bộ
An improved selective and diagnostic medium for the isolation and enumeration of Bacillus cereus in foods
Canadian Journal of Microbiology - Tập 26 Số 7 - Trang 753-759 - 1980
R. Holbrook, J.M. Anderson
The use and performance of an improved diagnostic and selective medium, PEMBA (polymyxin pyruvate egg yolk mannitol bromothymol blue agar), for the detection of Bacillus cereus in foods is described. The distinct colonial appearance of B. cereus on PEMBA permitted the recognition of both strains: those that do precipitate egg yolk and those that do not react with egg yolk. A staining proc...... hiện toàn bộ
Heterologous expression of two trichothecene P450 genes inFusarium verticillioides
Canadian Journal of Microbiology - Tập 52 Số 3 - Trang 220-226 - 2006
Susan P. McCormick, Nancy J. Alexander, Robert H. Proctor
Fusarium graminearum Z-3639 and F. sporotrichioides NRRL3299 produce the trichothecene mycotoxins 15-acetyldeoxynivalenol and T-2 toxin, respectively. These toxins differ in oxygenation at C-4, C-7, and C-8. In F. sporotrichioides, Tri1 (FsTri1) controls C-8 hydroxylation. To determine the function of an apparent F. graminearum Tri1 (FgTri1) homolog, both FsTri1 and FgTri1 genes were heter...... hiện toàn bộ
Copper stress and filamentous fungusHumicola lutea103 — ultrastructural changes and activities of key metabolic enzymes
Canadian Journal of Microbiology - Tập 58 Số 12 - Trang 1335-1343 - 2012
Ekaterina Ts. Krumova, Stoyanka Stoitsova, Tsvetelina Paunova‐Krasteva, Svetlana B. Pashova, Maria Angelova
Humicola lutea 103 is a copper-tolerant fungal strain able to grow in the presence of 300 μg·mL–1Cu2+under submerged cultivation. To prevent the consequences of copper overload, microorganisms have evolved molecular mechanisms that regulate its uptake, intracellular traffic, storage, and efflux. In spite of this avoidance strategy, high heavy-metal...... hiện toàn bộ
Binding of heterocyclic amines by lactic acid bacteria from miso, a fermented Japanese food
Canadian Journal of Microbiology - Tập 44 Số 2 - Trang 109-115 - 1998
R. Rajaram, Yoshiyuki Ohta
Miso, a widely used Japanese fermented food was analysed for its lactic acid bacterial count on bromocresol purple agar. The binding of eight different foodborne carcinogenic heterocyclic amines to 25 bacterial isolates from miso were investigated. The heterocyclic amines used were 3-amino-1,4-dimethyl[5H]pyrido(4,3-b)indole (Trp-P-1), 3-amino-1-methyl[5... hiện toàn bộ
Pythium and Mortierella in soils of Ontario forest nurseries
Canadian Journal of Microbiology - Tập 14 Số 3 - Trang 265-269 - 1968
O. Vaartaja
Populations of Pythium and Mortierella species were estimated by plating surface soils in agar media containing pentachloronitrobenzene, pimaricin, and bacterial antibiotics. Pythium spp. were found in 16 of 17 Ontario soils, mainly seedbed soils in forest nurseries. There was significant variation in the mean population density of Pythium propagules between two seedbeds sampled in each n...... hiện toàn bộ
Immunofluorescence studies of Nitrobacter populations in soils
Canadian Journal of Microbiology - Tập 23 Số 8 - Trang 1011-1017 - 1977
R Rennie, E. L. Schmidt
Certain steps of a protocol to enumerate a bacterium directly in soil by immunofluorescence were studied with respect to the enumeration of Nitrobacter in soils of diverse properties. Maximal counts of Nitrobacter were obtained by varying factors involved in the release of bacteria from the soil. Differences with respect to these factors were related to soil-colloidal properties. Enumerat...... hiện toàn bộ
Improved selective medium for isolating Cylindrocladium crotalariae microsclerotia from naturally infested soils
Canadian Journal of Microbiology - Tập 23 Số 6 - Trang 680-683 - 1977
G. J. Griffin
Reduced development of fusaria and other undesired fungi, and improved recognition of Cylindrocladium crotalariae colonies on soil-dilution plates were accomplished by supplementing a previously used medium (sucrose–TBZ medium) with three quaternary ammonium compounds, replacing peptone with tyrosine, and increasing the concentration of sucrose to yield a water potential of −10 bars. Thes...... hiện toàn bộ
POPULATIONS OF FUSARIUM OXYSPORUM F. MELONIS AND THEIR RELATION TO THE WILT POTENTIAL OF TWO SOILS
Canadian Journal of Microbiology - Tập 9 Số 2 - Trang 237-249 - 1963
R. N. Wensley, C. D. McKeen
The relation of soil populations of the muskmelon wilt fungus, Fusarium oxysporum f. melonis, to the wilt potentials of a yellow Fox sandy loam soil (Fsl) and a dark Colwood loam (Cl) was investigated. In either soil a direct relationship existed between the size of the population of the fungus and wilt incidence. Notwithstanding this relationship, with the same population the greater inc...... hiện toàn bộ
Serotype distribution of invasive Streptococcus pneumoniae in Canada after the introduction of the 13-valent pneumococcal conjugate vaccine, 2010–2012
Canadian Journal of Microbiology - Tập 59 Số 12 - Trang 778-788 - 2013
Walter Demczuk, Irene Martín, Averil Griffith, Brigitte Lefebvre, Allison McGeer, Marguerite Lovgren, Gregory J. Tyrrell, Shalini Desai, Lindsey Sherrard, Heather J Adam, Matthew W. Gilmour, George G. Zhanel
The introduction of the 7-valent pneumococcal vaccine (PCV7) in Canada was very effective in reducing invasive pneumococcal disease (IPD) in children; however, increases of non-PCV7 serotypes have subsequently offset some of these reductions. A 13-valent pneumococcal vaccine (PCV13) targeting additional serotypes was implemented between 2010 and 2011, and in 2012 changes in the incidence ...... hiện toàn bộ
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