Abstract：
:Parachlamydia acanthamoebae is an obligate intracellular bacterium naturally infecting free-living amoebae. The role of this bacterium as an agent of pneumonia is suggested by sero-epidemiological studies and molecular surveys. Furthermore, P. acanthamoebae may escape macrophages microbicidal effectors. Recently, we demonstrated that intratracheal inoculation of P. acanthamoebae induced pneumonia in 100% of infected mice. However, the intratracheal route of infection is not the natural way of infection and we therefore developed an intranasal murine model. Mice inoculated with P. acanthamoebae by intranasal inoculation lost 18% of their weight up to 8 days post-inoculation. All mice presented histological signs of pneumonia at day 2, 4, 7, and 10 post-inoculation, whereas no control mice harboured signs of pneumonia. A 5-fold increase in bacterial load was observed from day 0 to day 4 post-inoculation. Lungs of inoculated mice were positive by Parachlamydia-specific immunohistochemistry 4 days post-inoculation, and P. acanthamoebae were localized within macrophages. Thus, we demonstrated that P. acanthamoebae induce a severe pneumonia in mice. This animal model (i) further supports the role of P. acanthamoebae as an agent of pneumonia, confirming the third Koch postulate, and (ii) identified alveolar macrophages as one of the initial cells where P. acanthamoebae is localized following infection.
journal_name
Microbes Infectjournal_title
Microbes and infectionauthors
Pilloux L,Casson N,Sommer K,Klos A,Stehle JC,Pusztaszeri M,Greub Gdoi
10.1016/j.micinf.2015.08.007subject
Has Abstractpub_date
2015-11-01 00:00:00pages
755-60issue
11-12eissn
1286-4579issn
1769-714Xpii
S1286-4579(15)00167-7journal_volume
17pub_type
杂志文章abstract：:Acanthamoeba isolated from environmental soil harbors the obligate intracellular symbiont Neochlamydia, which has a critical role in host amoebal defense against Legionella pneumophila infection. Here, by using morphological analysis with confocal laser scanning fluorescence microscopy and transmission electron micros...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2017.12.012
更新日期：2018-04-01 00:00:00
abstract：:Monoxenous trypanosomatids usually have an invertebrate as the only host in their life cycles, however, they have been found repeatedly in plants and/or mammals. To succeed in colonizing a vertebrate host, the parasite must quickly adapt to drastic changes in the environment (e.g. temperature), which reflect the condi...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2010.07.010
更新日期：2010-11-01 00:00:00
abstract：:Pseudomonas aeruginosa, a significant cause of human morbidity and mortality, uses a type 3 secretion system (T3SS) to inject effector toxins into host cells. We previously reported that P. aeruginosa uses ADP-ribosyltransferase (ADPr) activity of the T3SS effector ExoS for intracellular replication. T3SS translocon (...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2012.08.007
更新日期：2012-12-01 00:00:00
abstract：:In refractory mosquitoes, melanotic encapsulation of Plasmodium ookinetes and oocysts is a commonly observed immune response. However, in susceptible mosquitoes, Plasmodium oocysts develop extracellularly in the body cavity without being recognized by the immune system. Like Plasmodium gallinaceum oocysts, negatively ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.11.006
更新日期：2007-02-01 00:00:00
abstract：:The establishment of infection by Brucella ovis and Brucella canis in J774.A1 macrophages was found to be dependent upon cholesterol and ganglioside GM(1), two components of lipid rafts. This process also required a class A scavenger receptor of macrophages, and was not inhibited by smooth and rough lipopolysaccharide...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2009.12.008
更新日期：2010-03-01 00:00:00
abstract：:Down syndrome (DS) is the most common chromosomal abnormality among live-born infants. Respiratory tract infections are the most important cause of mortality in individuals with DS at all ages. In recent decades several studies have been performed to elucidate abnormalities of the immune system in DS. However, the inf...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2010.05.007
更新日期：2010-10-01 00:00:00
abstract：:Several pathogens including Gram-negative bacteria hijack complement regulators to escape host's innate response. Pathogenic Leptospira species bind Factor H, C4b binding protein and vitronectin from the complement system. We evaluated the ability of low passage (LP) and culture-attenuated (CA) pathogenic strains of L...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2019.03.001
更新日期：2019-01-01 00:00:00
abstract：:Over the last 10 years - in Microbes and Infection - the publications dealing with protozoan parasites were mainly providing insights on the pathogenic processes leading to the local or systemic damages in the mammals, these parasitic organisms exploit/subvert as hosts. As a result, many investigators introduced the o...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2008.07.009
更新日期：2008-07-01 00:00:00
abstract：:Helicobacter pylori infection induces chronic inflammation in the gastric mucosa with a marked increase in the number of lymphoid follicles consisting of infiltrating B and T cells, neutrophils, dendritic cells (DC) and macrophages. It has been suggested that an accumulation of mature DC in the tissue, resulting from ...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2005.10.007
更新日期：2006-03-01 00:00:00
abstract：:Novel vaccines are needed to control tuberculosis (TB), the bacterial infectious disease that together with malaria and HIV is worldwide responsible for high levels of morbidity and mortality. TB can result from the reactivation of an initially controlled latent infection by Mycobacterium tuberculosis (Mtb). Mtb prote...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2011.08.011
更新日期：2012-01-01 00:00:00
abstract：:Highly pathogenic Yersinia carry a pathogenicity island termed high-pathogenicity island (HPI). The Yersinia HPI comprises genes involved in the synthesis of the siderophore yersiniabactin and can thus be regarded as an iron-uptake island. A unique characteristic of the HPI is its wide distribution among different ent...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(01)01412-5
更新日期：2001-06-01 00:00:00
abstract：:Helicobacter pylori activates extracellular-signal related (ERK) kinases in gastric epithelial cells, via transactivation of the EGF receptor (EGFR). H. pylori activation of EGFR may be relevant to epithelial hyperproliferation and gastric carcinogenesis. The aim of this study was to develop an 'In-Cell Western' (ICW)...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2007.03.004
更新日期：2007-06-01 00:00:00
abstract：:Foot-and-mouth disease virus (FMDV) is a member of the Aphthovirus genus in the Picornaviridae family. Seven distinct serotypes, each including a wide range of variants, have been defined. FMD, affects wild and domesticated ruminants and pigs, is difficult to control and is the major constraint to international trade ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(02)01634-9
更新日期：2002-08-01 00:00:00
abstract：:The strategies that allow Brucella abortus to persist for years inside macrophages subverting host immune responses are not completely understood. Immunity against this bacterium relies on the capacity of IFN-γ to activate macrophages, endowing them with the ability to destroy intracellular bacteria. We report here th...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2010.10.020
更新日期：2011-03-01 00:00:00
abstract：:In developed countries, enterohemorrhagic Escherichia coli (EHEC) O157:H7 is a leading cause of bloody diarrhea and renal failures in human. Understanding strategies employed by EHEC to colonize the intestine is of major importance since to date no cure exists to eradicate the pathogen. In this study, the adaptive res...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2014.09.008
更新日期：2015-01-01 00:00:00
abstract：:Anti-retroviral therapy is useful to treat human immunodeficiency virus type 1 (HIV-1)-infected individuals, but has some major problems, such as the generation of multidrug-resistant viruses. To develop a novel supplemental or alternative therapeutic for CCR5-tropic (R5) HIV-1 infection, we generated a recombinant ve...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2016.12.004
更新日期：2017-01-01 00:00:00
abstract：:In human blood, promastigotes bind natural antibodies and activate the classical complement pathway. C3-opsonized promastigotes immune-adhere within seconds to erythrocytes. Promastigote lysis by complement parallels C3 deposition kinetics, and ~90% of promastigotes are killed after 2.5 min. During infection, compleme...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(03)00071-6
更新日期：2003-05-01 00:00:00
abstract：:Conventional cell lines are commonly used to study infection characteristics of the human gastric pathogen Helicobacter pylori. We sought to investigate bacterial attachment to human antral primary epithelial cells, a cell model that more closely resembles the human stomach than transformed cell lines. Primary cells w...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(00)01322-8
更新日期：2000-11-01 00:00:00
abstract：:Twenty years ago we reported the first synthetic peptide-based anti-malarial vaccine named SPf66, which conferred limited protective efficacy in large-scale human field-trials. Our efforts towards a second vaccine generation based on the rational selection of conserved high activity binding peptides (HABPs) whose crit...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2007.02.004
更新日期：2007-05-01 00:00:00
abstract：:It has been appreciated for almost 20 years that members of the Chlamydiales possess a virulence-associated type III secretion mechanism. Given the obligate intracellular nature of these bacteria, defining exactly how type III secretion functions to promote pathogenesis has been challenging. We present a working model...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2015.10.006
更新日期：2016-02-01 00:00:00
abstract：:This review considers whether the products of schistosomes in the mammalian host can be considered as virulence factors. These include: the cercarial secretions used in infection, those of the migrating schistosomulum, surface-exposed proteins of adult worms in the portal system and their gut vomitus in the context of...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2012.09.001
更新日期：2012-12-01 00:00:00
abstract：:The occurrence of Bacillus thuringiensis bacteremia in a neutropenic patient suffering from severe pulmonary disease addressed the question of whether the aggressive behavior of B. thuringiensis depended on the host status and/or on the membrane-damaging toxins the isolate produced. After intratracheal injection, BALB...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2007.02.001
更新日期：2007-04-01 00:00:00
abstract：:Intramuscular immunization with DNA vaccines has been shown to induce a broad range of immune responses and protective immunity in many animal models, but it is less effective in primates. One reason for this may be the low expression of vector-encoded antigen in cells. Here we report that the use of vaccine vector (p...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.06.010
更新日期：2006-09-01 00:00:00
abstract：:Previously, we demonstrated that Valpha14+ NKT cells and IFN-gamma are important upstream components in neutrophil-mediated host defense against infection with Streptococcus pneumoniae. In the present study, we extended these findings by elucidating the role of IFN-gamma in this Valpha14+ NKT cell-promoted process. Ad...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2006.12.003
更新日期：2007-03-01 00:00:00
abstract：:Orientia tsutsugamushi, an obligate intracellular bacterium, was isolated for the first time in 1930. Infections by virulent strains are characterized by fever, rash, eschar, pneumonia, myocarditis, and disseminated intravascular coagulation. Here we review the general aspects of O. tsutsugamushi and immune responses ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)01352-6
更新日期：2001-01-01 00:00:00
abstract：:Grain feeding seems to promote the growth and acid resistance of Escherichia coli in fattening beef cattle, and acid-resistant E. coli are more likely to survive the human gastric stomach. When cattle were fed hay for only five days, the number and acid resistance of E. coli decreased dramatically. ...
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/s1286-4579(00)00286-0
更新日期：2000-01-01 00:00:00
abstract：:Pathogenic Leptospira species are the causative agents of leptospirosis, a global zoonotic infectious disease. Toxin-antitoxin (TA) modules have been confirmed as stress-response elements that induce prokaryotic and eukaryotic cell-growth arrest or death, but their role in the virulence of Leptospira has not been repo...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2014.10.010
更新日期：2015-01-01 00:00:00
abstract：:Exhaustive information on the Epstein-Barr virus, a member of the herpes family, is described at the International Herpes Management Forum web-site. Cervical cancer associations, AIDS treatment projects, and the Los Alamos National Laboratories provide useful information on papillomavirus infections, as well as hyperl...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/s1286-4579(00)01308-3
更新日期：2000-10-01 00:00:00
abstract：:Toxoplasma IgG and IgA, but not IgM, antibody titers were significantly higher in immunocompetent mice with cerebral proliferation of tachyzoites during the chronic stage of infection than those treated with sulfadiazine to inhibit the parasite growth. Their IgG and IgA antibody titers correlated significantly with th...
journal_title：Microbes and infection
pub_type： 杂志文章
doi：10.1016/j.micinf.2010.07.016
更新日期：2010-12-01 00:00:00
abstract：:Coxiella burnetii is an intracellular bacterium that causes acute and chronic Q fever. This unique pathogen has been historically challenging to study due to obstacles in genetically manipulating the organism and the inability of small animal models to fully mimic human Q fever. Here, we review the current state of C....
journal_title：Microbes and infection
pub_type： 杂志文章,评审
doi：10.1016/j.micinf.2019.09.001
更新日期：2020-04-01 00:00:00
