Le bactériologiste clinique face à un problème de classification : Moraxella, Achromobacter, Acinetobacter

1969 ◽  
Vol 15 (7) ◽  
pp. 655-663 ◽  
Author(s):  
André Leduc ◽  
Jean Fontaine ◽  
Michel Brazeau ◽  
Louise C. Panisset ◽  
Serge Montplaisir
Keyword(s):  
Differential Diagnosis ◽  
Gram Negative Bacteria ◽  
Review Of The Literature ◽  
Macconkey Agar ◽  
Bacterial Taxonomy ◽  
Gram Negative ◽  
The Family ◽  
The Subject ◽  
Group Ii ◽  
Medical Interest

The clinical bacteriologist faces a taxonomical problem concerning a group of Gram-negative, non-chromogenous, oxydase-negative bacilli, isolated on MacConkey agar and which produce no modification of Kligler medium (glucose, lactose, SH2).A review of the literature on the subject is made and allows the authors to adopt M. Piéchaud's nomenclature, which uses the term Moraxella and divides this genus in two groups:group I, oxydase-positive, is briefly discussed;group II, oxydase-negative, contains two species:(a) Moraxella lwoffi, which is synonymous with Mima polymorpha, Achromobacter, and Acinetobacter lwoffi,(b) Moraxella glucidolytica, also termed Herellea vaginicola, B5W, Bacterium anitratum, Achromobacter, and Acinetobacter anitratum.Table III is suggested for the differential diagnosis of these Gram-negative bacteria of medical interest, which do not belong to the family Enterobacteriaceae. This diagram also indicates the position that the authors think Moraxella, Achromobacter, and Acinetobacter should have in bacterial taxonomy.

scholarly journals Lipopolysaccharide-Trap-Fc, a Multifunctional Agent To Battle Gram-Negative Bacteria

2009 ◽  
Vol 77 (7) ◽  
pp. 2925-2931 ◽  
Author(s):  
Philipp Groß ◽  
Katharina Brandl ◽  
Christine Dierkes ◽  
Jürgen Schölmerich ◽  
Bernd Salzberger ◽  
...  
Keyword(s):  
Myeloid Differentiation ◽  
Gram Negative Bacteria ◽  
Bacterial Sepsis ◽  
Tlr Signaling ◽  
Monocytic Cells ◽  
Gram Negative ◽  
The Family ◽  
Myeloid Differentiation Factor ◽  
Lps Treatment

ABSTRACT The family of Toll-like receptors (TLRs) plays a pivotal role in host defense against pathogens. However, overstimulation of these receptors may lead to uncontrolled general inflammation and eventually to systemic organ dysfunction or failure. With the intent to control overwhelming inflammation during gram-negative bacterial sepsis, we constructed soluble fusion proteins of the lipopolysaccharide (LPS)-receptor complex to modulate TLR signaling in multiple ways. The extracellular domain of mouse TLR4 and mouse myeloid differentiation factor 2 (MD-2) fusions (LPS-Trap) were linked to human immunoglobulin G Fc domains (LPS-Trap-Fc). In addition to the ability to bind LPS or gram-negative bacteria and to inhibit interleukin-6 secretion of monocytic cells after LPS treatment, LPS-Trap-Fc was able to opsonize fluorescent Escherichia coli particles. This led to enhancement of phagocytosis by monocytic cells which was strictly dependent on the presence of the Fc region. Moreover, only LPS-Trap-Fc- and not LPS-Trap-coated bacteria were sensitized to complement killing. Therefore, LPS-Trap-Fc not only neutralizes LPS but also, after binding to bacteria, enhances phagocytosis and complement-mediated killing and could thus act as a multifunctional agent to fight gram-negative bacteria in vivo.

scholarly journals Growth of Clinically Important Gram-Negative Bacteria on MacConkey Agar under Aerobic versus CO2-Enriched Environment

2019 ◽  
Vol 57 (12) ◽  
Author(s):  
Mohammad Rubayet Hasan ◽  
Mohammed Suleiman ◽  
Elizabeth Ilagan ◽  
Nigel Crouch ◽  
Andres Perez Lopez ◽  
...  
Keyword(s):  
Enriched Environment ◽  
Gram Negative Bacteria ◽  
Macconkey Agar ◽  
Gram Negative

scholarly journals Gene Targeting in Gram-Negative Bacteria by Use of a Mobile Group II Intron (“Targetron”) Expressed from a Broad-Host-Range Vector

2007 ◽  
Vol 73 (8) ◽  
pp. 2735-2743 ◽  
Author(s):  
Jun Yao ◽  
Alan M. Lambowitz
Keyword(s):  
Host Range ◽  
Gene Targeting ◽  
Inducible Promoter ◽  
Broad Host Range ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Efficient Gene ◽  
Range Vector ◽  
Group Ii ◽  
Broad Host Range Vector

ABSTRACT Mobile group II introns (“targetrons”) can be programmed for insertion into virtually any desired DNA target with high frequency and specificity. Here, we show that targetrons expressed via an m-toluic acid-inducible promoter from a broad-host-range vector containing an RK2 minireplicon can be used for efficient gene targeting in a variety of gram-negative bacteria, including Escherichia coli, Pseudomonas aeruginosa, and Agrobacterium tumefaciens. Targetrons expressed from donor plasmids introduced by electroporation or conjugation yielded targeted disruptions at frequencies of 1 to 58% of screened colonies in the E. coli lacZ, P. aeruginosa pqsA and pqsH, and A. tumefaciens aopB and chvI genes. The development of this broad-host-range system for targetron expression should facilitate gene targeting in many bacteria.

scholarly journals IDENTIFIKASI BAKTERI AEROB GRAM NEGATIF DAN GRAM POSITIF MENGGUNAKAN METODE KONVENSIONAL DAN OTOMATIK

2018 ◽  
Vol 19 (2) ◽  
pp. 105
Author(s):  
Patricia M. Tauran ◽  
Irda Handayani ◽  
Nurhayana Sennang
Keyword(s):  
Aerobic Bacteria ◽  
Gram Negative Bacteria ◽  
Bacterial Taxonomy ◽  
Biochemical Tests ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Automated Method ◽  
Automatic Methods ◽  
Automated Methods

Choosing the method of bacteria identification is crucial to obtain accurate and quick results. This study will analyze the identificationresults of Gram negative and Gram positive from aerobic bacteria by examination using conventional and automatic methods at Dr.Wahidin Sudirohusodo Hospital Laboratory. A total of 85 samples consisting of 66 Gram negative bacteria and 19 Gram positive bacteriawere identified using conventional and automated methods. In this study, there was some correspondent identification result betweenthe conventional as well as the automated methods, namely 31.5% for Gram negative bacteria and 30.8% for Gram positive bacteria.However, the non-correspondent identification result between conventional and automated methods was found greater, namely, 68.5%for Gram negative bacteria and 69.2% for Gram positive bacteria. The non-correspondent identification result was due to the developmentof bacterial taxonomy and the differences of numbers and types of the biochemical tests between conventional and automatic methods.Bacteria identification using automated method is more accurate and faster than the conventional method, so it is recommended usingthis particularly for the laboratory and educational referral center.

Diagnosis and Treatment of Atypical Odontalgia: A Review of the Literature and Two Case Reports

2007 ◽  
Vol 8 (3) ◽  
pp. 81-89 ◽  
Author(s):  
Marcello Melis ◽  
Simona Secci
Keyword(s):  
Differential Diagnosis ◽  
Tricyclic Antidepressants ◽  
Myofascial Pain ◽  
Dental Treatment ◽  
Case Reports ◽  
Correct Diagnosis ◽  
Diagnosis And Treatment ◽  
Review Of The Literature ◽  
Atypical Odontalgia ◽  
The Subject

Abstract Aim This report presents two cases diagnosed with atypical odontalgia (AO) and successfully treated with amitriptyline as well providing a review of the current literature on the subject. Results The literature indicates the most important issue is an accurate differential diagnosis to distinguish between AO, pulpal pain, myofascial pain, and trigeminal neuralgia. Conclusion Once the correct diagnosis is made the prognosis of AO is usually fair and the administration of tricyclic antidepressants often resolves symptoms. An effort should be made to avoid any unnecessary dental treatment that would only aggravate the problem. Citation Melis M, Secci S. Diagnosis and Treatment of Atypical Odontalgia: A Review of the Literature and Two Case Reports. J Contemp Dent Pract 2007 March;(8)3:081-089.

scholarly journals Bactericidal/permeability-increasing protein in the reproductive system of male mice may be involved in the sperm–oocyte fusion

Reproduction ◽  
2013 ◽  
Vol 146 (2) ◽  
pp. 135-144 ◽  
Author(s):  
Kun Li ◽  
Yue Liu ◽  
Xiaoyu Xia ◽  
Li Wang ◽  
Meige Lu ◽  
...  
Keyword(s):  
Transport Proteins ◽  
Seminal Vesicles ◽  
Lipid Transport ◽  
Human Neutrophils ◽  
Gram Negative Bacteria ◽  
Male Mice ◽  
Gram Negative ◽  
Major Function ◽  
The Family ◽  
Lps Binding

Bactericidal/permeability-increasing protein (BPI) is a 455-residue (∼55 kDa) protein found mainly in the primary (azurophilic) granules of human neutrophils. BPI is an endogenous antibiotic protein that belongs to the family of mammalian lipopolysaccharide (LPS)-binding and lipid transport proteins. Its major function is to kill Gram-negative bacteria, thereby protecting the host from infection. In addition, BPI can inhibit angiogenesis, suppress LPS-mediated platelet activation, increase DNA synthesis, and activate ERK/Akt signaling. In this study, we found thatBpiwas expressed in the testis and epididymis but not in the seminal vesicles, prostate, and solidification glands. BPI expression in the epididymis increased upon upregulation of testosterone, caused by injection of GNRH. In orchidectomized mice, BPI expression was significantly reduced, but its expression was restored to 30% of control levels in orchidectomized mice that received supplementary testosterone. The number of sperm fused per egg significantly decreased after incubation with anti-BPI antiserum. These results suggest that BPI may take part in the process of sperm–oocyte fusion and play a unique and significant role in reproduction.

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