Role of relative humidity in the survival of airborne Mycoplasma pneumoniae.

Abstract:

:Aerosols of Mycoplasma pneumoniae were studied at several relative humidities at a controlled temperature of 27 C. Production of an experimentally reproducible aerosol required preatomization of the organism in its suspending fluid and was dependent on the type of fluid used in atomization as well as on the procedures used to produce an aerosol. The airborne particles studied were within the range of epidemiological significance, with most being 2 mum or less in diameter. Survival of the airborne mycoplasma in these particles was found to be best at very low and at very high humidities. The most lethal relative humidity levels were at 60 and 80%, at which levels fewer than 1% of the organisms survived over a 4-hr observation period. However, survival of the organism at most relative humidity levels was such that long-term infectivity could be expected from aerosols of M. pneumoniae. Because of the extreme sensitivity of M. pneumoniae at critical humidity levels, control of the airborne transmission of these organisms may be possible in selected spaces.

journal_name

J Bacteriol

journal_title

Journal of bacteriology

authors

Wright DN,Bailey GD,Hatch MT

doi

10.1128/JB.96.4.970-974.1968

subject

Has Abstract

pub_date

1968-10-01 00:00:00

pages

970-4

issue

4

eissn

0021-9193

issn

1098-5530

journal_volume

96

pub_type

杂志文章
  • Cloning and sequencing of a Bacteroides ruminicola B(1)4 endoglucanase gene.

    abstract::Bacteroides ruminicola B(1)4, a noncellulolytic rumen bacterium, produces an endoglucanase (carboxymethylcellulase [CMCase]) that is excreted into the culture supernatant. Cultures grown on glucose, fructose, maltose, mannose, and cellobiose had high specific activities of CMCase (greater than 3 mmol of reducing sugar...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.172.7.3620-3630.1990

    authors: Matsushita O,Russell JB,Wilson DB

    更新日期:1990-07-01 00:00:00

  • Roles of charged residues of rotor and stator in flagellar rotation: comparative study using H+-driven and Na+-driven motors in Escherichia coli.

    abstract::In Escherichia coli, rotation of the flagellar motor has been shown to depend upon electrostatic interactions between charged residues of the stator protein MotA and the rotor protein FliG. These charged residues are conserved in the Na+-driven polar flagellum of Vibrio alginolyticus, but mutational studies in V. algi...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.188.4.1466-1472.2006

    authors: Yakushi T,Yang J,Fukuoka H,Homma M,Blair DF

    更新日期:2006-02-01 00:00:00

  • Choline-containing bacteriophage receptors in Streptococcus pneumoniae.

    abstract::Choline-containing teichoic acid seems to be essential for the adsorption of bacteriophage Dp-1 to pneumococci. This conclusion is based on the following observations: In contrast to pneumococci grown in choline-containing medium, cells grown in medium containing ethanolamine or other submethylated aminoalcohols inste...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.151.3.1581-1590.1982

    authors: Lopez R,Garcia E,Garcia P,Ronda C,Tomasz A

    更新日期:1982-09-01 00:00:00

  • Complete genome sequence of "Vulcanisaeta moutnovskia" strain 768-28, a novel member of the hyperthermophilic crenarchaeal genus Vulcanisaeta.

    abstract::Strain 768-28 was isolated from a hot spring in Kamchatka, Russia, and represents a novel member of the Vulcanisaeta genus. The complete genome sequence of this thermoacidophilic anaerobic crenarchaeon reveals genes for protein and carbohydrate-active enzymes, the Embden-Meyerhof and Entner-Doudoroff pathways for gluc...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.00237-11

    authors: Gumerov VM,Mardanov AV,Beletsky AV,Prokofeva MI,Bonch-Osmolovskaya EA,Ravin NV,Skryabin KG

    更新日期:2011-05-01 00:00:00

  • Complete genome sequence of Erythrobacter litoralis HTCC2594.

    abstract::Erythrobacter litoralis has been known as a bacteriochlorophyll a-containing, aerobic, anoxygenic, phototrophic bacterium. Here we announce the complete genome sequence of E. litoralis HTCC2594, which is devoid of phototrophic potential. E. litoralis HTCC2594, isolated by dilution-to-extinction culturing from seawater...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.00026-09

    authors: Oh HM,Giovannoni SJ,Ferriera S,Johnson J,Cho JC

    更新日期:2009-04-01 00:00:00

  • Procedure for isolating mutants defective in metabolite transport or utilization.

    abstract::Mutants defective in uptake or utilization of a given metabolite can readily be obtained from facultative auxotrophs (for that metabolite) by penicillin enrichment under nonpermissive conditions in the presence of a low level of the required metabolite. ...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.121.3.1216-1218.1975

    authors: Berg CM,Rossi JJ,Coleman JV,Conlon M

    更新日期:1975-03-01 00:00:00

  • Cytosine methylation by the SuaI restriction-modification system: implications for genetic fidelity in a hyperthermophilic archaeon.

    abstract::5-methylcytosine in chromosomal DNA represents a potential source of frequent spontaneous mutation for hyperthermophiles. To determine the relevance of this threat for the archaeon Sulfolobus acidocaldarius, the mode of GGCC methylation by its restriction-modification system, SuaI, was investigated. Distinct isoschizo...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.185.15.4657-4661.2003

    authors: Grogan DW

    更新日期:2003-08-01 00:00:00

  • Cloning and analysis of the Bacillus subtilis rpsD gene, encoding ribosomal protein S4.

    abstract::The rpsD gene, encoding ribosomal protein S4, was isolated from Bacillus subtilis by hybridization with oligonucleotide probes derived from the S4 amino-terminal protein sequence. Sequence analysis of the cloned DNA indicated that rpsD is likely to be monocistronic, in contrast to Escherichia coli rpsD, which is locat...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.172.11.6372-6379.1990

    authors: Grundy FJ,Henkin TM

    更新日期:1990-11-01 00:00:00

  • Mannitol, a novel bacterial compatible solute in Pseudomonas putida S12.

    abstract::The aim of this study was to identify the compatible solutes accumulated by Pseudomonas putida S12 subjected to osmotic stress. In response to reduced water activity, P. putida S12 accumulated Nalpha-acetylglutaminylglutamine amide (NAGGN) simultaneously with a novel compatible solute identified as mannitol (using 13C...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.178.23.6665-6670.1996

    authors: Kets EP,Galinski EA,de Wit M,de Bont JA,Heipieper HJ

    更新日期:1996-12-01 00:00:00

  • Inverted repeats in the DNA of plasmid pCU1.

    abstract::Renaturable regions in the DNA strands of the N group plasmid pCU1 have been visualized as stem-loop structures by electron microscopy. Four such distinct structures are described, the smallest of which is within the loop of a larger one. The region of pCU1 in which these structures occur has several restriction sites...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.153.3.1502-1512.1983

    authors: Konarska-Kozlowska M,Thatte V,Iyer VN

    更新日期:1983-03-01 00:00:00

  • Dependence of Escherichia coli hyperbaric oxygen toxicity on the lipid acyl chain composition.

    abstract::This study examines certain membrane-related aspects of oxygen poisoning in Escherichia coli K1060 (fabB fadE lacI) and its parent strain, K-12 Ymel. Cells were grown to exponential or stationary phase in a minimal medium and exposed to air plus 300 lb/in2 of O2 as a suspension in minimal salts. After an initial lag, ...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.134.3.808-820.1978

    authors: Harley JB,Santangelo GM,Rasmussen H,Goldfine H

    更新日期:1978-06-01 00:00:00

  • F plasmid ccd mechanism in Escherichia coli.

    abstract::The ccd mechanism specified by the ccdA and ccdB genes of the mini-F plasmid determines fate of plasmid-free segregants in Escherichia coli (Jaffé et al., J. Bacteriol. 163:841-849, 1985). The killing function in plasmid-free segregants by the ccd mechanism did not affect cell growth of coexisting cells in the same cu...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.166.1.100-104.1986

    authors: Hiraga S,Jaffé A,Ogura T,Mori H,Takahashi H

    更新日期:1986-04-01 00:00:00

  • 16S ribosomal DNA amplification for phylogenetic study.

    abstract::A set of oligonucleotide primers capable of initiating enzymatic amplification (polymerase chain reaction) on a phylogenetically and taxonomically wide range of bacteria is described along with methods for their use and examples. One pair of primers is capable of amplifying nearly full-length 16S ribosomal DNA (rDNA) ...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.173.2.697-703.1991

    authors: Weisburg WG,Barns SM,Pelletier DA,Lane DJ

    更新日期:1991-01-01 00:00:00

  • Evidence for an S-layer protein pool in the peptidoglycan of Bacillus stearothermophilus.

    abstract::Intact cells of Bacillus stearothermophilus PV72 revealed, after conventional thin-sectioning procedures, the typical cell wall profile of S-layer-carrying gram-positive eubacteria consisting of a ca. 10-nm-thick peptidoglycan-containing layer and a ca. 10-nm-thick S layer. Cell wall preparations obtained by breaking ...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.174.24.8008-8015.1992

    authors: Breitwieser A,Gruber K,Sleytr UB

    更新日期:1992-12-01 00:00:00

  • Hybridization studies reveal homologies between pBF4 and pBFTM10, Two clindamycin-erythromycin resistance transfer plasmids of Bacteroides fragilis.

    abstract::Two clindamycin-erythromycin resistance transfer factors of Bacteroides fragilis, pBF4 and pBFTM10, were analyzed for regions of DNA homology. Although the plasmids were derived from different clinical isolates of B. fragilis and have different sizes, they showed homology in the clindamycin-erythromycin resistance reg...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:

    authors: Shimell MJ,Smith CJ,Tally FP,Macrina FL,Malamy MH

    更新日期:1982-11-01 00:00:00

  • Identification of a DtxR-regulated operon that is essential for siderophore-dependent iron uptake in Corynebacterium diphtheriae.

    abstract::The diphtheria toxin repressor (DtxR) uses Fe(2+) as a corepressor and inhibits transcription from iron-regulated promoters (IRPs) in Corynebacterium diphtheriae. A new IRP, designated IRP6, was cloned from C. diphtheriae by a SELEX-like procedure. DtxR bound to IRP6 in vitro only in the presence of appropriate divale...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.184.17.4846-4856.2002

    authors: Qian Y,Lee JH,Holmes RK

    更新日期:2002-09-01 00:00:00

  • Isolation of subunits from Methanosarcina barkeri ATPase: nucleotide-binding site in the alpha subunit.

    abstract::The alpha (62,000-dalton) and beta (49,000-dalton) subunits of Methanosarcina barkeri ATPase were purified to homogeneity. The subunits and ATPase complex were trypsinized in the presence of various nucleotides. ATP and ADP changed the trypsin sensitivity of the alpha subunit in the complex and isolated forms, suggest...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.170.12.5960-5962.1988

    authors: Inatomi K,Maeda M

    更新日期:1988-12-01 00:00:00

  • Functional characterization of a novel ArgA from Mycobacterium tuberculosis.

    abstract::The Mycobacterium tuberculosis gene Rv2747 encodes a novel 19-kDa ArgA that catalyzes the initial step in L-arginine biosynthesis, namely the conversion of L-glutamate to alpha-N-acetyl-L-glutamate. Initial velocity studies reveal that Rv2747 proceeds through a sequential kinetic mechanism, with K(m) values of 280 mM ...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.187.9.3039-3044.2005

    authors: Errey JC,Blanchard JS

    更新日期:2005-05-01 00:00:00

  • Coordination chemistry of microbial iron transport compounds: rhodotorulic acid and iron uptake in Rhodotorula pilimanae.

    abstract::The mechanism by which iron uptake is facilitated by the siderophore rhodotorulic acid (RA) in the yeast Rhodotorula pilimanae was investigated with radioactively labeled Fe and RA and kinetically inert, chromic-substituted RA complexes. The weight of the evidence supports a model in which RA mediates iron transport t...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.136.1.69-74.1978

    authors: Carrano CJ,Raymond KN

    更新日期:1978-10-01 00:00:00

  • Paracrystalline inclusions of a novel ferritin containing nonheme iron, produced by the human gastric pathogen Helicobacter pylori: evidence for a third class of ferritins.

    abstract::An abundant 19.3-kDa Helicobacter pylori protein has been cloned, and the sequence is homologous with a ferritin-like protein produced by Escherichia coli K-12. Homologies are also present with a number of eucaryotic ferritins, as well as with the heme group-containing bacterioferritins. All amino acids involved in ch...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.175.4.966-972.1993

    authors: Frazier BA,Pfeifer JD,Russell DG,Falk P,Olsén AN,Hammar M,Westblom TU,Normark SJ

    更新日期:1993-02-01 00:00:00

  • Organization of enzymes in the polyaromatic synthetic pathway: separability in bacteria.

    abstract::ULTRACENTRIFUGATION IN SUCROSE DENSITY GRADIENTS WAS EMPLOYED TO ESTIMATE THE MOLECULAR WEIGHTS AND TO DETERMINE POSSIBLE PHYSICAL AGGREGATION OF THE FIVE ENZYMES CATALYZING STEPS TWO TO SIX IN THE PRECHORISMIC ACID PORTION OF THE POLYAROMATIC SYNTHETIC PATHWAY IN SIX SPECIES OF BACTERIA: Escherichia coli, Salmonella ...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.99.1.222-230.1969

    authors: Berlyn MB,Giles NH

    更新日期:1969-07-01 00:00:00

  • Regulation of bacterial cell walls: correlation between autolytic activity and cell wall turnover in Staphylococcus aureus.

    abstract::Cell wall turnover was examined in parent and mutant strains of Staphylococcus aureus. Peptidoglycan and teichoic acid were observed to undergo turnover in the wild-type strain during exponential growth; however, the rate of turnover did not decrease when the growth rate slowed, as the culture entered stationary phase...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.134.2.555-561.1978

    authors: Wong W,Chatterjee AN,Young FE

    更新日期:1978-05-01 00:00:00

  • Replication of plasmid RK2 in vitro by a DNA-membrane complex: evidence for initiation of replication and its coupling to transcription and translation.

    abstract::The following results with an in vitro replication system utilizing a plasmid RK2 DNA-membrane complex indicate that the essential trfA-encoded replication protein of RK2 is present and active in the complex. (i) A complex extracted from a conditional replication mutant of RK2, which contains a temperature-sensitive m...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.167.1.319-326.1986

    authors: Kornacki JA,Firshein W

    更新日期:1986-07-01 00:00:00

  • Effects of deoxyribonucleic acid products on deoxyribonucleic acid synthesis of virulent and avirulent pneumococci.

    abstract::Firshein, W. (Wesleyan University, Middletown, Conn.). Effects of deoxyribonucleic acid products on deoxyribonucleic acid synthesis of virulent and avirulent pneumococci. J. Bacteriol. 82:169-180. 1961.-Cell suspensions of virulent pneumococci synthesize a greater amount of deoxyribonucleic acid (DNA) per cell in the ...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.82.2.169-180.1961

    authors: FIRSHEIN W

    更新日期:1961-08-01 00:00:00

  • Adenosine 5'-triphosphate synthesis driven by a protonmotive force in membrane vesicles of Escherichia coli.

    abstract::Adenosine 5'-triphosphate (ATP) synthesis energized by an artificially imposed protonmotive force (delta p) in adenosine 5'-diphosphate-loaded membrane vesicles of Escherichia coli was investigated. The protonmotive force is composed of an artificially imposed pH gradient (delta pH) or membrane potential (deltapsi), o...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.129.2.763-769.1977

    authors: Tsuchiya T

    更新日期:1977-02-01 00:00:00

  • Metabolism of dibutylphthalate and phthalate by Micrococcus sp. strain 12B.

    abstract::Micrococcus sp. strain 12B was isolated by enriching for growth with dibutylphthalate as the sole carbon and energy source. A pathway for the metabolism of dibutylphthalate and phthalate by micrococcus sp. strain 12B is proposed: dibutylphthalate leads to monobutylphthalate leads to phthalate leads to 3,4-dihydro-3,4-...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.151.1.48-57.1982

    authors: Eaton RW,Ribbons DW

    更新日期:1982-07-01 00:00:00

  • Gene-product relationships of fhlA and fdv genes of Escherichia coli.

    abstract::Synthesis of formate dehydrogenase coupled to formate hydrogenlyase activity in Escherichia coli was found to require the product of the fhlA gene. Transcription of fdhF, the gene coding for the 80-kilodalton (kDa) selenopeptide of formate dehydrogenase, was not detected in an fhlA genetic background. Mutations in the...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.170.12.5440-5445.1988

    authors: Sankar P,Lee JH,Shanmugam KT

    更新日期:1988-12-01 00:00:00

  • Mutations in genes cpxA and cpxB of Escherichia coli K-12 cause a defect in isoleucine and valine syntheses.

    abstract::Mutations in two chromosomal genes of Escherichia coli, cpxA and cpxB, produced a temperature-sensitive growth defect that was remedied specifically by the addition of isoleucine and valine to the minimal medium. This auxotrophy was manifested only when the medium contained exogenous leucine, suggesting that mutant ce...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.144.1.68-73.1980

    authors: McEwen J,Silverman P

    更新日期:1980-10-01 00:00:00

  • Small cytoplasmic RNA of Bacillus subtilis: functional relationship with human signal recognition particle 7S RNA and Escherichia coli 4.5S RNA.

    abstract::Small cytoplasmic RNA (scRNA; 271 nucleotides) is an abundant and stable RNA of the gram-positive bacterium Bacillus subtilis. To investigate the function of scRNA in B. subtilis cells, we developed a strain that is dependent on isopropyl-beta-D-thiogalactopyranoside for scRNA synthesis by fusing the chromosomal scr l...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/jb.174.7.2185-2192.1992

    authors: Nakamura K,Imai Y,Nakamura A,Yamane K

    更新日期:1992-04-01 00:00:00

  • Mapping of a structural gene for valyl-transfer ribonucleic acid synthetase in Escherichia coli by transduction.

    abstract::A structural gene, valS, for the valyl-transfer ribonucleic acid synthetase of Escherichia coli has been mapped on the clockwise side of pyrB and is closely linked to it. ...

    journal_title:Journal of bacteriology

    pub_type: 杂志文章

    doi:10.1128/JB.98.2.837-839.1969

    authors: Tingle MA,Neidhardt FC

    更新日期:1969-05-01 00:00:00