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| Registros recuperados: 31 | |
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| Staats,Charley Christian; Boldo,Juliano; Broetto,Leonardo; Vainstein,Marilene; Schrank,Augusto. |
| Mycoplasmas are very fastidious in their nutritional requirements for in vitro growth and have limited biosynthetic capacity, a reflection of their reduced genomes. As a result, these bacteria depend upon external metabolites for nutrition and growth and have developed dependence on their hosts for survival and maintenance. Protein degradation and peptide importation play an important role in Mycoplasma spp. nutrition, and proteases can play a role in host adaptation and pathogenicity. Here, we present a general survey on the genes involved in protein degradation, secretion and importation, comparing all available Mollicute genomes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycoplasma; Proteases; Minimal genomes; Secretion systems. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000200009 |
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| Pinto,Paulo Marcos; Carvalho,Marcos Oliveira de; Alves-Junior,Leonardo; Brocchi,Marcelo; Schrank,Irene Silveira. |
| Diversification of bacterial species and pathotypes is largely caused by lateral gene transfer (LGT) of diverse mobile DNA elements such as plasmids, phages, transposons and genomic islands. Thus, acquisition of new phenotypes by LGT is very important for bacterial evolution and relationship with hosts. This paper reports a 23 kb region containing fourteen CDSs with similarity to the previous described Integrative Conjugal Element of Mycoplasma fermentans (ICEF). This element, named ICEH, is present as one copy at distinct integration sites in the chromosome of 7448 and 232 pathogenic strains and is absent in the type strain J (non-pathogenic). Notable differences in the nucleotide composition of the insertion sites were detected, and could be correlated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: LGT; Mycoplasma; Constins. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000200014 |
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| Borges,Clayton Luiz; Parente,Juliana Alves; Pereira,Maristela; Soares,Célia Maria de Almeida. |
| Mycoplasmas are the smallest known prokaryotes with self-replication ability. They are obligate parasites, taking up many molecules of their hosts and acting as pathogens in men, animals, birds and plants. Mycoplasma hyopneumoniae is the infective agent of swine mycoplasmosis and Mycoplasma synoviae is responsible for subclinical upper respiratory infections that may result in airsacculitis and synovitis in chickens and turkeys. These highly infectious organisms present a worldwide distribution and are responsible for major economic problems. Proteins of the GTPase superfamily occur in all domains of life, regulating functions such as protein synthesis, cell cycle and differentiation. Despite their functional diversity, all GTPases are believed to have... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycoplasma; GTPase superfamily; Genome. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000200007 |
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| Arraes,Fabricio B.M.; Carvalho,Maria José A. de; Maranhão,Andrea Q.; Brígido,Marcelo M.; Pedrosa,Fábio O.; Felipe,Maria Sueli S.. |
| The annotation and comparative analyses of the genomes of Mycoplasma synoviae and Mycoplasma hyopneumonie, as well as of other Mollicutes (a group of bacteria devoid of a rigid cell wall), has set the grounds for a global understanding of their metabolism and infection mechanisms. According to the annotation data, M. synoviae and M. hyopneumoniae are able to perform glycolytic metabolism, but do not possess the enzymatic machinery for citrate and glyoxylate cycles, gluconeogenesis and the pentose phosphate pathway. Both can synthesize ATP by lactic fermentation, but only M. synoviae can convert acetaldehyde to acetate. Also, our genome analysis revealed that M. synoviae and M. hyopneumoniae are not expected to synthesize polysaccharides, but they can take... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mollicutes; Mycoplasma; Metabolism; Comparative genomics. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000200004 |
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| Cano, Irene; Ryder, David; Webb, Steve C.; Jones, Brian J.; Brosnahan, Cara L.; Carrasco, Noelia; Bodinier, Barbara; Furones, Dolors; Pretto, Tobia; Carella, Francesca; Chollet, Bruno; Arzul, Isabelle; Cheslett, Deborah; Collins, Evelyn; Lohrmann, Karin B.; Valdivia, Ana L.; Ward, Georgia; Carballal, María J.; Villalba, Antonio; Marigómez, Ionan; Mortensen, Stein; Christison, Kevin; Kevin, Wakeman C.; Bustos, Eduardo; Christie, Lyndsay; Green, Matthew; Feist, Stephen W.. |
| Intracellular microcolonies of bacteria (IMC), in some cases developing large extracellular cysts (bacterial aggregates), infecting primarily gill and digestive gland, have been historically reported in a wide diversity of economically important mollusk species worldwide, sometimes associated with severe lesions and mass mortality events. As an effort to characterize those organisms, traditionally named as Rickettsia or Chlamydia-like organisms, 1950 specimens comprising 22 mollusk species were collected over 10 countries and after histology examination, a selection of 99 samples involving 20 species were subjected to 16S rRNA gene amplicon sequencing. Phylogenetic analysis showed Endozoicomonadaceae sequences in all the mollusk species analyzed.... |
| Tipo: Text |
Palavras-chave: Mollusk; OTU; Endozoicomonas; Chlamydiae; Mycoplasma; Francisella; Lucinoma; Ridgeia. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00658/77032/78322.pdf |
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| Otto, Lars. |
| We present an economic decision support model, based on a Bayesian network, for Mycoplasma infection in slaughter swine production. The model describes the various risk factors for Mycoplasma infection and their interactions. This leads to a stochastic determination of the consequences of productivity factors, and this again results in stochastic economic consequences when changing the risk factors or engaging in control arrangements. We use the model to calculate how estimated prevalence and level of Mycoplasma changes when we gather evidence from various veterinarian examinations, and we show how this influences the distribution of the economic results of a change in strategy to fight Mycoplasma. One result is that the profitability in fighting... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Decision support system; Bayesian network; Pig; Mycoplasma; Livestock Production/Industries; C11; D81; Q12. |
| Ano: 2005 |
URL: http://purl.umn.edu/24458 |
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| Batista,IA; Hoepers,PG; Silva,MFB; Nunes,PLF; Diniz,DCA; Freitas,AG; Cossi,MVC; Fonseca,BB. |
| SUMMARY Raising backyard birds is a common practice in Brazil, mainly in the countryside or suburban areas. However, the level of respiratory pathogens in these animals is unknown. We sampled two hundred chickens from 19 backyard flocks near commercial poultry farms and performed ELISA to Infectious Bronchitis Virus, avian Metapneumovirus, Mycoplasma synoviae and Mycoplasma gallisepticum. We evaluated the association between the predictive ability of ELISA and Hemagglutination-inhibition (HI)by comparing results from eight flocks positive to Mycoplasma gallisepticum on ELISA. Besides, we assessed essential biosecurity measures in the properties (multiple species birds, rodent control, hygienic conditions, and water quality for the bird`s consumption). We... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avian Metapneumovirus; ELISA; Hemagglutination-inhibition; Infectious Bronchitis Virus; Mycoplasma. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100324 |
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| Nascimento,ER do; Polo,P de A; Pereira,VL de A; Barreto,ML; Nascimento,M da GF do; Zuanaze,MAF; Corrêa,ARA; Silva,R de CF. |
| False positive serologic reactions and difficulties in the diagnosis of Mycoplasma gallisepticum (MG) in chickens have increased lately as a result of infection by low virulent MG strains and the use of live MG vaccines in poultry. The objective of this study was to evaluate the serologic responses of SPF chickens exposed to the three commercially available live MG vaccines, and one low virulent MG strain (MG-70), contributing to the diagnosis and monitoring of MG infection in birds. Six groups of SPF chickens were used. The control group was not infected nor challenged; one group was infected with the low virulent strain MG-70 (MG-70); three groups were immunized and named after the MG vaccine used, i.e., MG-6/85, MG-ts11, and MG-F; and finally one group... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycoplasma; Poultry; Serology; Vaccination. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000100007 |
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| Nascimento,ER; Pereira,VLA; Nascimento,MGF; Barreto,ML. |
| Avian mycoplasmas occur in a variety of bird species. The most important mycoplasmas for chickens and turkeys are Mycoplasma gallisepticum (MG), M. synoviae (MS), and M. meleagridis. Besides, M. iowe (MI) is an emerging pathogen in turkeys, but of little concern for chickens. Mycoplasmas are bacteria that lack cell wall and belong to the class Mollicutes. Although they have been considered extracellular agents, scientists admit nowadays that some of them are obligatory intracellular microorganisms, whereas all other mycoplasmas are considered facultative intracellular organisms. Their pathogenic mechanism for disease include adherence to host target cells, mediation of apoptosis, innocent bystander damage to host cell due to intimate membrane contact,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Airsacculitis; Diagnosis; Mycoplasma; Mollicutes; Poultry. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000100001 |
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| Gavião Prado, Luan; Vieira Sene, Rafael; Camargo de Medeiros, Elisângela; Maioli do Nascimento, Letícia; Beatriz França de Faria, Ana. |
| Hemoparasitosis, diseases that may cause clinical and hematological complications, are considered a great challenge to practitioners and clinical pathologists. Its high incidence in all Brazilian territory and the difficulty for a precise diagnosis can lead in most cases to a therapeutic diagnosis. Anaplasma platys, Babesia canis vogeli, Ehrlichia canis, Mycoplasma haemocanis and with a lower frequency and clinical relevance, Anaplasma phagocytophilum are the main etiological agents affecting dogs in Brazil. The climatic conditions found in several Brazilian areas, such as high rain and temperature levels, favor the arthropods vectors life cycles. This subject became an important challenge to both veterinarians and pet owners. These etiological agents... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hemoparasite; Anaplasma; Babesia; Mycoplasma; Ehrlichia; Hemoparasitose; Anaplasma; Babesia; Mycoplasma; Ehrlichia. |
| Ano: 2019 |
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/37999 |
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| Nascimento,Elmiro R.; DaMassa,Al J.; Yamamoto,Richard; Nascimento,M. Graça F.. |
| One-hundred-five (105) clinical isolates of mycoplasma from caprine origin and one isolate from ovine were surveyed for plasmids, which were present in thirty-three (31%) of them. These mycoplasmas originated from 13 herds. Ten of them were symptomatic for mycoplasmal disease (mastitis, polyarthritis, septicemia) and three herds were asymptomatic, i.e., clinically normal. Twenty-eight isolates were Mycoplasma mycoides subspecies mycoides LC (large colony or caprine biotype), four were Mycoplasma capricolum subsp. capricolum and one was Mycoplasma cottewii. The isolated plasmids were linearized by EcoRI, EcoRV, EcoRI and EcoRV or BamHI and EcoRV, and were of five sizes (1.1, 1.6, 1.7, 1.8, and 1.9 Kbp). Based on restriction enzyme digestion and size of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycoplasma; Plasmid; Goat; Endonuclease; Electrophoresis. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000100006 |
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| CORDOVA,CAIO M.M.; HOELTGEBAUM,DANIELA L.; MACHADO,LAÍS D.P.N.; SANTOS,LARISSA DOS. |
| ABSTRACT Mycoplasmas are a large group of bacteria, sorted into different genera in the Mollicutes class, whose main characteristic in common, besides the small genome, is the absence of cell wall. They are considered cellular and molecular biology study models. We present an updated review of the molecular biology of these model microorganisms and the development of replicative vectors for the transformation of mycoplasmas. Synthetic biology studies inspired by these pioneering works became possible and won the attention of the mainstream media. For the first time, an artificial genome was synthesized (a minimal genome produced from consensus sequences obtained from mycoplasmas). For the first time, a functional artificial cell has been constructed by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycoplasma; Molecular biology; Microbial genetics; Synthetic biology; Gene transfer techniques. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200599 |
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| Registros recuperados: 31 | |
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