1
|
Trenkwalder A, Zaccanti M, Poli N. A flexible system-on-a-chip control hardware for atomic, molecular, and optical physics experiments. Rev Sci Instrum 2021; 92:105103. [PMID: 34717387 DOI: 10.1063/5.0058986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/13/2021] [Indexed: 06/13/2023]
Abstract
We have implemented a control system core for experiments in atomic, molecular, and optical physics based on a commercial low-cost board, featuring a field-programmable gate array as part of a system-on-a-chip on which a Linux operating system is running. The board features Gigabit Ethernet, allowing for fast data transmission and operation of remote experimental systems. A single board can control a set of devices generating digital, analog, and radio frequency signals with precise timing given either by an external or internal clock. Contiguous output and input sampling rates of up to 40 MHz are achievable. Several boards can run synchronously with a timing error approaching 1 ns. For this purpose, a novel auto-synchronization scheme is demonstrated, with possible application in complex distributed experimental setups with demanding timing requests.
Collapse
Affiliation(s)
- A Trenkwalder
- Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (INO-CNR), 50019 Sesto Fiorentino, Italy
| | - M Zaccanti
- Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (INO-CNR), 50019 Sesto Fiorentino, Italy
| | - N Poli
- Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (INO-CNR), 50019 Sesto Fiorentino, Italy
| |
Collapse
|
2
|
Kaur N, Comini E, Zappa D, Poli N, Sberveglieri G. Nickel oxide nanowires: vapor liquid solid synthesis and integration into a gas sensing device. Nanotechnology 2016; 27:205701. [PMID: 27053627 DOI: 10.1088/0957-4484/27/20/205701] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In the field of advanced sensor technology, metal oxide nanostructures are promising materials due to their high charge carrier mobility, easy fabrication and excellent stability. Among all the metal oxide semiconductors, nickel oxide (NiO) is a p-type semiconductor with a wide band gap and excellent optical, electrical and magnetic properties, which has not been much investigated. Herein, we report the growth of NiO nanowires by using the vapor liquid solid (VLS) technique for gas sensing applications. Platinum, palladium and gold have been used as a catalyst for the growth of NiO nanowires. The surface morphology of the nanowires was investigated through scanning electron microscopy to find out which catalyst and growth conditions are best for the growth of nanowires. GI-XRD and Raman spectroscopies were used to confirm the crystalline structure of the material. Different batches of sensors have been prepared, and their sensing performances towards different gas species such as carbon monoxide, ethanol, acetone and hydrogen have been explored. NiO nanowire sensors show interesting and promising performances towards hydrogen.
Collapse
Affiliation(s)
- N Kaur
- SENSOR Laboratory University of Brescia and CNR-INO, Via D. Valotti 9, 25133 Brescia, Italy
| | | | | | | | | |
Collapse
|
3
|
Munasinghe M, Comini E, Zappa D, Poli N, Sberveglieri G. Low Temperature Gas Sensing Properties of Graphene Oxide/SnO 2 Nanowires Composite for H 2. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.proeng.2016.11.202] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
4
|
Tarallo MG, Mazzoni T, Poli N, Sutyrin DV, Zhang X, Tino GM. Test of Einstein equivalence principle for 0-spin and half-integer-spin atoms: search for spin-gravity coupling effects. Phys Rev Lett 2014; 113:023005. [PMID: 25062176 DOI: 10.1103/physrevlett.113.023005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Indexed: 06/03/2023]
Abstract
We report on a conceptually new test of the equivalence principle performed by measuring the acceleration in Earth's gravity field of two isotopes of strontium atoms, namely, the bosonic (88)Sr isotope which has no spin versus the fermionic (87)Sr isotope which has a half-integer spin. The effect of gravity on the two atomic species has been probed by means of a precision differential measurement of the Bloch frequency for the two atomic matter waves in a vertical optical lattice. We obtain the values η=(0.2±1.6)×10(-7) for the Eötvös parameter and k=(0.5±1.1)×10(-7) for the coupling between nuclear spin and gravity. This is the first reported experimental test of the equivalence principle for bosonic and fermionic particles and opens a new way to the search for the predicted spin-gravity coupling effects.
Collapse
Affiliation(s)
- M G Tarallo
- Dipartimento di Fisica e Astronomia and LENS-Università di Firenze, INFN-Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy
| | - T Mazzoni
- Dipartimento di Fisica e Astronomia and LENS-Università di Firenze, INFN-Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy
| | - N Poli
- Dipartimento di Fisica e Astronomia and LENS-Università di Firenze, INFN-Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy
| | - D V Sutyrin
- Dipartimento di Fisica e Astronomia and LENS-Università di Firenze, INFN-Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy
| | - X Zhang
- Dipartimento di Fisica e Astronomia and LENS-Università di Firenze, INFN-Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy
| | - G M Tino
- Dipartimento di Fisica e Astronomia and LENS-Università di Firenze, INFN-Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy
| |
Collapse
|
5
|
Galstyan V, Comini E, Baratto C, Ferroni M, Poli N, Faglia G, Bontempi E, Brisotto M, Sberveglieri G. Two-phase Titania Nanotubes for Gas Sensing. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.proeng.2014.11.612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
6
|
Nevsky A, Alighanbari S, Chen QF, Ernsting I, Vasilyev S, Schiller S, Barwood G, Gill P, Poli N, Tino GM. Robust frequency stabilization of multiple spectroscopy lasers with large and tunable offset frequencies. Opt Lett 2013; 38:4903-4906. [PMID: 24322162 DOI: 10.1364/ol.38.004903] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We have demonstrated a compact, robust device for simultaneous absolute frequency stabilization of three diode lasers whose carrier frequencies can be chosen freely relative to the reference. A rigid ULE multicavity block is employed, and, for each laser, the sideband locking technique is applied. A small lock error, computer control of frequency offset, wide range of frequency offset, simple construction, and robust operation are the useful features of the system. One concrete application is as a stabilization unit for the cooling and trapping lasers of a neutral-atom lattice clock. The device significantly supports and improves the clock's operation. The laser with the most stringent requirements imposed by this application is stabilized to a line width of 70 Hz, and a residual frequency drift less than 0.5 Hz/s. The carrier optical frequency can be tuned over 350 MHz while in lock.
Collapse
|
7
|
Schioppo M, Poli N, Prevedelli M, Falke S, Lisdat C, Sterr U, Tino GM. A compact and efficient strontium oven for laser-cooling experiments. Rev Sci Instrum 2012; 83:103101. [PMID: 23126745 DOI: 10.1063/1.4756936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Here we describe a compact and efficient strontium oven well suited for laser-cooling experiments. Novel design solutions allowed us to produce a collimated strontium atomic beam with a flux of 1.0 × 10(13) s(-1) cm(-2) at the oven temperature of 450 °C, reached with an electrical power consumption of 36 W. The oven is based on a stainless-steel reservoir, filled with 6 g of metallic strontium, electrically heated in a vacuum environment by a tantalum wire threaded through an alumina multi-bore tube. The oven can be hosted in a standard DN40CF cube and has an estimated continuous operation lifetime of 10 years. This oven can be used for other alkali and alkaline earth metals with essentially no modifications.
Collapse
Affiliation(s)
- M Schioppo
- Dipartimento di Fisica e Astronomia and LENS, Università di Firenze and INFN Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy
| | | | | | | | | | | | | |
Collapse
|
8
|
Poli N, Wang FY, Tarallo MG, Alberti A, Prevedelli M, Tino GM. Precision measurement of gravity with cold atoms in an optical lattice and comparison with a classical gravimeter. Phys Rev Lett 2011; 106:038501. [PMID: 21405305 DOI: 10.1103/physrevlett.106.038501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Indexed: 05/30/2023]
Abstract
We report on a precision measurement of gravitational acceleration using ultracold strontium atoms confined in an amplitude-modulated vertical optical lattice. An uncertainty Δg/g ≈ 10(-7) is reached by measuring at the 5th harmonic of the Bloch frequency. The value obtained with this microscopic quantum system is consistent with the one measured with a classical gravimeter. Using lattice modulation to prepare the atomic sample, we also achieve high visibility of Bloch oscillations for ∼ 20 s. These results can be of relevance for testing gravitational redshift and Newtonian law at micrometer scale.
Collapse
Affiliation(s)
- N Poli
- Dipartimento di Fisica e Astronomia and LENS, Università di Firenze and INFN Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy
| | | | | | | | | | | |
Collapse
|
9
|
Poli N, Morten JP, Urech M, Brataas A, Haviland DB, Korenivski V. Spin injection and relaxation in a mesoscopic superconductor. Phys Rev Lett 2008; 100:136601. [PMID: 18517980 DOI: 10.1103/physrevlett.100.136601] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2007] [Indexed: 05/26/2023]
Abstract
We study spin transport in a superconducting nanowire using a set of closely spaced magnetic tunnel contacts. We observe a giant enhancement of the spin accumulation of up to 5 orders of magnitude on transition into the superconducting state, consistent with the expected changes in the density of states. The spin relaxation length decreases by an order of magnitude from its value in the normal state. These measurements, combined with our theoretical model, allow us to distinguish the individual spin-flip mechanisms present in the transport channel. Our conclusion is that magnetic impurities rather than spin-orbit coupling dominate spin-flip scattering in the superconducting state.
Collapse
Affiliation(s)
- N Poli
- Nanostructure Physics, Royal Institute of Technology, 10691 Stockholm, Sweden
| | | | | | | | | | | |
Collapse
|
10
|
Barber ZW, Stalnaker JE, Lemke ND, Poli N, Oates CW, Fortier TM, Diddams SA, Hollberg L, Hoyt CW, Taichenachev AV, Yudin VI. Optical lattice induced light shifts in an yb atomic clock. Phys Rev Lett 2008; 100:103002. [PMID: 18352181 DOI: 10.1103/physrevlett.100.103002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Indexed: 05/26/2023]
Abstract
We present an experimental study of the lattice-induced light shifts on the (1)S(0) --> (3)P(0) optical clock transition (nu(clock) approximately 518 THz) in neutral ytterbium. The "magic" frequency nu(magic) for the 174Yb isotope was determined to be 394 799 475(35) MHz, which leads to a first order light shift uncertainty of 0.38 Hz. We also investigated the hyperpolarizability shifts due to the nearby 6s6p(3)P(0) --> 6s8p(3)P(0), 6s8p(3)P(2), and 6s5f(3)F(2) two-photon resonances at 759.708, 754.23, and 764.95 nm, respectively. By measuring the corresponding clock transition shifts near these two-photon resonances, the hyperpolarizability shift was estimated to be 170(33) mHz for a linear polarized, 50 microK deep, lattice at the magic wavelength. These results indicate that the differential polarizability and hyperpolarizability frequency shift uncertainties in a Yb lattice clock could be held to well below 10(-17).
Collapse
Affiliation(s)
- Z W Barber
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Ludlow AD, Zelevinsky T, Campbell GK, Blatt S, Boyd MM, de Miranda MHG, Martin MJ, Thomsen JW, Foreman SM, Ye J, Fortier TM, Stalnaker JE, Diddams SA, Le Coq Y, Barber ZW, Poli N, Lemke ND, Beck KM, Oates CW. Sr lattice clock at 1 x 10(-16) fractional uncertainty by remote optical evaluation with a Ca clock. Science 2008; 319:1805-8. [PMID: 18276849 DOI: 10.1126/science.1153341] [Citation(s) in RCA: 442] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Optical atomic clocks promise timekeeping at the highest precision and accuracy, owing to their high operating frequencies. Rigorous evaluations of these clocks require direct comparisons between them. We have realized a high-performance remote comparison of optical clocks over kilometer-scale urban distances, a key step for development, dissemination, and application of these optical standards. Through this remote comparison and a proper design of lattice-confined neutral atoms for clock operation, we evaluate the uncertainty of a strontium (Sr) optical lattice clock at the 1 x 10(-16) fractional level, surpassing the current best evaluations of cesium (Cs) primary standards. We also report on the observation of density-dependent effects in the spin-polarized fermionic sample and discuss the current limiting effect of blackbody radiation-induced frequency shifts.
Collapse
Affiliation(s)
- A D Ludlow
- JILA, National Institute of Standards and Technology, and University of Colorado, Department of Physics, University of Colorado, Boulder, CO 80309-0440, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Fazioli R, Mottinelli A, Ballasina M, Billa F, Bonetti U, Bonseri V, Cavedo R, De Luca D, Farina M, Frusconi K, Maccagni E, Monfredini M, Pezzali C, Bonvini M, Mariotti M, Poli N. [Theoretical-practical training for personnel involved in patient assistance for limiting the risk of manual handling of the patients in a hospital company]. G Ital Med Lav Ergon 2007; 29:585. [PMID: 18409845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Worker education and training must represent a deep cultural change that can be achieved, fulfilled and strengthened through constant guiding steps and periodical checks regarding practical application of acquired knowledge. In our hospital, a multi-subject team has been identified to face such problem of risk reduction from inpatient mobilization in a shared and synergic manner. Therefore a theory and practical training course is being proposed, with a theoretic part of one hour and a half to be held in a classroom to small groups (not more than 20 people) and a practical part (addressed to 8 people groups) composed of 4 sections of 1 hour and a half each: once listening in class and then being subdivided in the relative belonging wards as well as after an explanation, everyone will have here the chance to perform the correct manual mobilization handlings also in association with the use of minor aid devices. At the end of each section, a referent-educator is identified for each Operative Unit: such a figure is extremely important as a reference for his/her collegues, for new employees and to support and/or substitute the outside inspector in checking operations during the year following the end of the course itself. This latest phase is thus considered absolutely necessary to realize the actual change in the staff habits.
Collapse
Affiliation(s)
- R Fazioli
- Azienda Istituti Ospitalieri di Cremona
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Ferrari G, Poli N, Sorrentino F, Tino GM. Long-lived BLOCH oscillations with bosonic sr atoms and application to gravity measurement at the micrometer scale. Phys Rev Lett 2006; 97:060402. [PMID: 17026151 DOI: 10.1103/physrevlett.97.060402] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2006] [Indexed: 05/12/2023]
Abstract
We report on the observation of Bloch oscillations on the unprecedented time scale of several seconds. The experiment is carried out with ultracold bosonic 88Sr atoms loaded into a vertical optical standing wave. The negligible atom-atom elastic cross section and zero angular momentum in the ground state makes 88Sr an almost ideal Bose gas, insensitive to typical mechanisms of decoherence due to thermalization and external stray fields. The small size of the system enables precision measurements of forces at micrometer scale. This is a challenge in physics for studies of surfaces, Casimir effects, and searches for deviations from Newtonian gravity predicted by theories beyond the standard model.
Collapse
Affiliation(s)
- G Ferrari
- Dipartimento di Fisica and LENS, Università di Firenze, INFN, INFM-CNR, I-50019 Sesto Fiorentino (FI), Italy
| | | | | | | |
Collapse
|
14
|
Poli N, Ferrari G, Prevedelli M, Sorrentino F, Drullinger RE, Tino GM. Laser sources for precision spectroscopy on atomic strontium. Spectrochim Acta A Mol Biomol Spectrosc 2006; 63:981-6. [PMID: 16527534 DOI: 10.1016/j.saa.2005.10.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2005] [Revised: 10/02/2005] [Accepted: 10/09/2005] [Indexed: 05/07/2023]
Abstract
We present a new laser setup designed for high-precision spectroscopy on laser cooled atomic strontium. The system, which is entirely based on semiconductor laser sources, delivers 200 mW at 461 nm for cooling and trapping atomic strontium from a thermal source, 4 mW at 497 nm for optical pumping from the metastable P23 state, 12 mW at 689 nm on linewidth less than 1 kHz for second-stage cooling of the atomic sample down to the recoil limit, 1.2 W at 922 nm for optical trapping close to the "magic wavelength" for the 0-1 intercombination line at 689 nm. The 689 nm laser was already employed to perform a frequency measurement of the 0-1 intercombination line with a relative accuracy of 2.3 x 10(-11), and the ensemble of laser sources allowed the loading in a conservative dipole trap of multi-isotopes strontium mixtures. The simple and compact setup developed represents one of the first steps towards the realization of a transportable optical standards referenced to atomic strontium.
Collapse
Affiliation(s)
- N Poli
- Dipartimento di Fisica and LENS, Instituto Nazionale di Fisica Nucleare, Sezione di Firenze, Italy
| | | | | | | | | | | |
Collapse
|
15
|
Abstract
The notion of decoupling of spin and charge currents is one of the basic principles underlying the rapidly expanding field of spintronics. However, no direct demonstration of the phenomenon exists. We report a novel measurement in which a nonequilibrium spin population is created by a pointlike injection of current from a ferromagnet across a tunnel barrier into a one-dimensional spin channel and detected differentially by a pair of ferromagnetic electrodes placed symmetrically about the injection point. We demonstrate that the spin current is strictly isotropic about the injection point and, therefore, completely decoupled from the unidirectional charge current.
Collapse
Affiliation(s)
- M Urech
- Nanostructure Physics, Royal Institute of Technology, 10691 Stockholm, Sweden.
| | | | | | | |
Collapse
|
16
|
Ferrari G, Cancio P, Drullinger R, Giusfredi G, Poli N, Prevedelli M, Toninelli C, Tino GM. Precision frequency measurement of visible intercombination lines of strontium. Phys Rev Lett 2003; 91:243002. [PMID: 14683113 DOI: 10.1103/physrevlett.91.243002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2003] [Indexed: 05/24/2023]
Abstract
We report the direct frequency measurement of the visible 5s(2) 1S0-5s5p 3P1 intercombination line of strontium that is considered a possible candidate for a future optical-frequency standard. The frequency of a cavity-stabilized laser is locked to the saturated fluorescence in a thermal Sr atomic beam and is measured with an optical-frequency comb generator referenced to the SI second through a global positioning system signal. The 88Sr transition is measured to be at 434 829 121 311 (10) kHz. We measure also the 88Sr-86Sr isotope shift to be 163 817.4 (0.2) kHz.
Collapse
Affiliation(s)
- G Ferrari
- Dipartimento di Fisica and LENS, Università di Firenze, INFM-UdR Firenze, Polo Scientifico, 50019 Sesto Fiorentino, Italy
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Pan A, Catenazzi P, Ferrari L, Tinelli C, Seminari E, Ratti A, Carnevale G, Cogrossi A, Crema L, Dolcetti L, Barosi C, Granata L, La Russa A, Poli N, Tomasoni D, Ceruti T. [Evaluation of the efficacy of a program to control nosocomial spread of methicillin-resistant Staphylococcus aureus]. Infez Med 2001; 9:163-9. [PMID: 12087218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
OBJECTIVE To evaluate the efficacy of a program to control nosocomial spread of methicillin-resistant Staphylococcus aureus (MRSA). METHODS Analysis of the incidence of infection and contamination due to MRSA in patients admitted to the hospital of Cremona 6 months before and 3 years after the introduction of the guidelines (July 1997). RESULTS During the 42 months of the study period, on 80705 admissions, 511 cases of MRSA contamination/infection were identified, the incidence being 0.57 cases per 100 admissions. The infection rate dropped from 0.34 (IC95%: 0.25-0.45) in the first 6 months of the study, before the introduction of guidelines, to 0.17 (IC95%: 0.14-0.20) in the following 3 years (p=0.01). Severe infection decreased from 0.18 to 0.1 per 100 admissions, with a 44% decrease (p=0.058), while mild infections diminished from 0.16 to 0.07 per 100 admissions (p=0.045). Methicillin resistance among nosocomial isolates of Staphylococcus aureus was reduced from 53 % to 35 % (p<0.0001). CONCLUSIONS The introduction of a program to control the nosocomial spread of MRSA proved effective in reducing both the incidence of infection and the methicillin-resistance of Staphylococcus aureus isolates. The cost effectiveness of the program seems very favourable.
Collapse
Affiliation(s)
- A Pan
- Istituti Ospitalieri di Cremona, Brescia, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
|