Morphometric characterization of Khaya senegalensis in southern Minas Gerais State, Brazil

O presente trabalho apresenta os resultados da caracterização geoespelológica das Grutas Baixada das Crioulas I e II, bem comoos principais aspectos espeleogenéticos associada a este sistema cárstico desenvolvido em rochas quatzíticas. Há, ainda hoje, grandecontrovérsia em torno da denominação de formas de relevo em rochas não carbonáticas, que apresentam similitudes com aquelasdesenvolvidas em relevo cárstico. Entre essas formas, destacam-se aquelas desenvolvidas em rochas quartzíticas Onze cavernasdesenvolvidas em rochas desta litologia em um conjunto montanhoso situado no município de Itambé do Mato Dentro, borda leste daSerra do Espinhaço Meridional (MG), foram localizadas e analisadas. Elas foram estudadas com o objetivo principal de compreender osprocessos de formação inerentes a essas feições. As cavernas Gruta Baixada das Crioulas I e Gruta Baixada das Crioulas II formam uminteressante sistema cárstico na região, com importantes atributos morfológicos, litológicos, estruturais e de depósitos endorcársticos. AGruta Baixada das Crioulas I destaca-se por seus atributos morfométricos, pois a caverna supera os 1000m de desenvolvimento horizontale 75m de desnível,medidas estas bastante representativas em se tratando de cavernas desenvolvidas em rochas quartzíticas,tanto emMinas Gerais, quanto no Brasil.Palavras-chave: geoespeleologia, sistema cárstico, quartzito, Serra do Espinhaço. ABSTRACTGEOSPELEOLOGY AND MAIN SPELEOGENETIC ASPECTS OF BAIXADA DAS CRIOULAS I AND II CAVES, ITAMBÉ DO MATO DENTRO,MINAS GERAIS. This research presents the results of the geospeleological characterization of the caves Gruta Baixada das Crioulas I and II,as well as the main speleogenetic aspects associated to this karst system developed in quartzite rocks. There are still controversies aboutthe denomination of features developed in non-carbonate rocks that present similarities with those developed in karstic relief. Amongthese features, those developed in quartzite rocks can be highlighted. Eleven caves formed in quartzite rocks were found in a mountainouslocation in the municipality of Itambé do Mato Dentro, the eastern border of Serra do Espinhaço Meridional, Minas Gerais State. They werestudied with the objective to understand the inherent processes involved in their formation and development. The caves Gruta Baixada dasCrioulas I and Gruta Baixada das Crioulas II form a karst system with important morphological, lithological, structural and endokarstdeposits that are characteristic of karstic forms. That is the case of the Gruta Baixada das Crioulas I which is outstanding because of itsmorphometric attributes with a length of more than 1000m and a depth of approximately 75m. These measures are fairly representativewhen compared to other caves in quartzite located not only in Minas Gerais but also in Brazil.Keywords: geospeleology, karst system, quartzite, Serra do Espinhaço.

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Karyological characterization of a new population ofAkodon lindberghi(Rodentia, Sigmodontinae) in Minas Gerais State (Brazil)

Caryologia ◽

10.1080/00087114.1996.10797350 ◽

1996 ◽

Vol 49 (1) ◽

pp. 57-63 ◽

Cited By ~ 8

Author(s):

L. Geise ◽

R. Cerqueira ◽

H.N. Seuánez

Keyword(s):

Minas Gerais ◽

Minas Gerais State

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Genetic and Functional Characterization of an MCR-3-Like Enzyme-Producing Escherichia coli Isolate Recovered from Swine in Brazil

Antimicrobial Agents and Chemotherapy ◽

10.1128/aac.00278-18 ◽

2018 ◽

Vol 62 (7) ◽

Cited By ~ 17

Author(s):

Nicolas Kieffer ◽

Patrice Nordmann ◽

Andrea Micke Moreno ◽

Luisa Zanolli Moreno ◽

Richard Chaby ◽

...

Keyword(s):

Escherichia Coli ◽

South America ◽

Genetic Analysis ◽

Lipid A ◽

Functional Characterization ◽

Minas Gerais ◽

Content Type ◽

Coli Isolate ◽

Minas Gerais State

ABSTRACT A collection of 126 pigs was screened for carriage of colistin-resistant Enterobacteriaceae in a farm in Minas Gerais, Brazil. Out of this collection, eight colistin-resistant Escherichia coli isolates were recovered, including one from Minas Gerais State producing a new MCR-3 variant (MCR-3.12). Analysis of the lipopolysaccharide revealed that MCR-3.12 had a function similar to that of MCR-1 and MCR-2 as a result of the addition of a phosphoethanolamine group to the lipid A moiety. Genetic analysis showed that the mcr-3.12 gene was carried by an IncA/C 2 plasmid and was embedded in an original genetic environment. This study reports the occurrence of the MCR-3-like determinant in South America and is the first to demonstrate the functionality of this group of enzymes as a phosphoethanolamine transferase.

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Phenotypic and Genotypic Characterization of Salmonella spp. Isolated from Foods Involved in Human Salmonellosis Outbreaks in Minas Gerais State, Brazil

Journal of Food Protection ◽

10.4315/jfp-21-287 ◽

2021 ◽

Author(s):

Leandro Leão Faula ◽

MONICA M.O.P. CERQUEIRA ◽

JOVITA E.G.C. MADEIRA ◽

MARCELO R. SOUZA ◽

FERNANDO N. SOUZA ◽

...

Keyword(s):

Virulence Genes ◽

Multidrug Resistant ◽

Minas Gerais ◽

Health Centers ◽

Salmonella Spp ◽

Resistant Phenotype ◽

Minas Gerais State ◽

Human Salmonellosis ◽

Human Infections

Salmonella spp. is one of the primary pathogens that cause foodborne diseases worldwide. In the present study, we deeply characterized Salmonella spp. originated from foods related to human salmonellosis outbreaks in Minas Gerais – Brazil, from 2003 to 2017. In this regard, the serotyping, antimicrobial susceptibility, virulence genes and genetic polymorphism determined by rep-PCR were performed in 70 Salmonella spp. isolates. Thirteen serotypes of Salmonella spp. were identified, and S. Enteritidis and S. Typhimurium were the most prevalent, both corresponding to 74.3% (52/70) of all isolates. Sixty-five (92.8%) isolates demonstrated to be resistant to at least one of the 15 antimicrobials tested. Ten isolates (14.2%) showed a multidrug-resistant phenotype. Sixteen virulence genes were screened and detection ranged from 75.7 to 100% of all isolates. There was a statistical difference among Salmonella spp. serotypes in detecting the sipB , sopE , lfpA , sefA and spvC genes. Forty isolates of S. Enteritidis from 16 outbreaks were grouped into 14 fingerprints, while 12 S. Typhimurium retrieved six fingerprints. The bacteria presented a serological pattern like those reported by main public health centers worldwide. One major concern of our findings is the high levels of both detection of virulence genes and resistance to antimicrobials, especially to critically important drugs. In this concern, especial attention should be given to the serotype S. Enteritidis. Although the isolates of Salmonella spp. have presented a relatively variable genome, high genetic similarity was observed among them, with some of them sharing identical fingerprints. These results corroborate the hypothesis of clonal circulation of Salmonella spp. in human infections in Minas Gerais.

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Soil catenas in a pilot sub-basin in the region of Itajubá, Minas Gerais state, Brazil, for environmental planning

Semina Ciências Agrárias ◽

10.5433/1679-0359.2021v42n3supl1p1511 ◽

2021 ◽

Vol 42 (3Supl1) ◽

pp. 1511-1528

Author(s):

Olívia de Lima ◽

◽

Eliane Guimarães Pereira Melloni ◽

Rogério Melloni ◽

Marcelo Ribeiro Barison ◽

...

Keyword(s):

Urban Area ◽

Environmental Planning ◽

Minas Gerais ◽

Steep Slope ◽

Agricultural Activities ◽

Soil Material ◽

Forest Remnant ◽

Minas Gerais State ◽

Biological Reserve

Systemic studies that allow the environmental characterization of pilot sub-basins are essential to guide their management, which are the basis for adequate environmental planning. The José Pereira sub-basin has an area of approximately 40 km² and is located in the municipality of Itajubá, south of the state of Minas Gerais, Brazil. This area was chosen as a pilot sub-basin for this study because it holds an important forest remnant, the Serra dos Toledos Biological Reserve, and part of the urban area of the municipality in the process of expansion, as well as a rural area where inappropriate and intensive agricultural activities are practiced. In this scenario, this atudy examined the soil catenas of this sub-basin to serve as an important instrument of planning for this unit. Eight soil catenas distributed into three topo-morphological compartments were studied. According to the generated soil map, Haplic Cambisols occupy 26% of the sub-basin, in mountainous relief; Red and Red-Yellow Latosols, 6% of the area, predominating in the flat-to-undulating relief; Haplic Gleysols, 7% of the area, in the lowlands, in flat relief and at the footslope. Finally, Red and Red-Yellow Argisols were the predominant classes, occurring in almost 50% of the sub-basin, under undulating and strongly undulating reliefs. Based on the combined results, a model of local evolution of the sub-basin soils was proposed: the younger soils, Haplic Cambisol and Haplic Gleysol, occupy the positions of convex top and floodplain, respectively. In the upper and lower thirds of the landscape, the predominance of Red Argisol is related to constant renewal of soil material, preventing it from reaching the latosolic stage. In addition, part of these Argisols has a Bw horizon below Bt horizon in rugged relief. Moreover, in the landscape lower third, Latosols are present, even in areas with steep slope.

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