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Pneumocystis Jirovecii

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https://www.readbyqxmd.com/read/28223177/pneumocystis-pneumonia-in-patients-with-inflammatory-or-autoimmune-diseases-usefulness-of-lymphocyte-subtyping
#1
Yi Li, Marc Ghannoum, Chuntao Deng, Yanxia Gao, Huadong Zhu, Xuezhong Yu, Valery Lavergne
OBJECTIVES: No consensus currently exists on indications for Pneumocystis jirovecii prophylaxis in patients with inflammatory or autoimmune diseases. The main objective was to identify biomarkers associated with Pneumocystis jirovecii pneumonia (PcP) in this population. METHODS: A retrospective study was carried out at Beijing Union Medical College Hospital (2003-2014). All patients with an inflammatory or autoimmune diseases presenting with acute onset of fever and respiratory symptoms were included...
February 18, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28214275/detection-of-pneumocystis-jirovecii-by-nested-pcr-in-hiv-negative-patients-with-pulmonary-disease
#2
Cristina Rodrigues Santos, Ângela M de Assis, Edson A Luz, Luzia Lyra, Ivan F Toro, José Claudio C Seabra, Dira H Daldin, Tathiane U Marcalto, Marcos T Galasso, Ronaldo F Macedo, Angélica Z Schreiber, Francisco H Aoki
BACKGROUND: Nested PCR can be used to determine the status of Pneumocystis jirovecii infection in other lung diseases. AIMS: This study sought to detect a target DNA fragment (mitochondrial large subunit rRNA or mtL SUrRNA) of P. jirovecii in patients with lung disease who underwent bronchoscopy with collection of bronchoalveolar lavage (BAL). METHODS: The results from toluidine blue staining were compared with those obtained using molecular methods that included an "in house" DNA extraction procedure, PCR and nested PCR...
February 14, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28193704/pneumocystis-colonization-in-asthmatic-patients-not-receiving-oral-corticosteroid-therapy
#3
Emma L Davey, Rhonda E Colombo, Charles Fiorentino, Gary Fahle, Richard T Davey, Kenneth N Olivier, Joseph A Kovacs
: Pneumocystis jirovecii can colonize patients with chronic obstructive pulmonary disease. To determine if colonization occurs in asthma patients, sputum samples from 10 patients with mild asthma, who were not receiving oral corticosteroids, were evaluated by a sensitive real-time PCR assay that targets a multicopy gene of P. jirovecii. 2 patients (20%) had Pneumocystis DNA detected; 1 patient had 3 positive samples over an 11-day period. Thus, Pneumocystis colonization occurs in asthma patients, and further studies are warranted to evaluate its role in airways disease...
February 13, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/28192629/the-effect-of-co-trimoxazole-on-serum-potassium-concentration-safety-evaluation-of-a-randomised-controlled-trial
#4
Wei Yee Chan, Allan B Clark, Andrew M Wilson, Yoon K Loke
AIMS: Co-trimoxazole maintains a well-established role in the treatment of Pneumocystis jirovecii and Toxoplasma gondii, as well as urinary tract infections. Observational studies report hyperkalemia associated with co-trimoxazole which may stem from an amiloride-like potassium sparing effect. Our study reports on changes in serum potassium on patients without acute infections, and the influence of concomitant anti-kaliuretic drugs on this effect. METHODS: Post-hoc analysis of a randomised controlled trial in patients with interstitial lung disease who were assigned to placebo or 960 mg twice daily co-trimoxazole...
February 13, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28185780/corrigendum-to-caspofungin-salvage-therapy-in-pneumocystis-jirovecii-pneumonia-j-microbiol-immunol-infect-2016-pii-s1684-1182-16-30029-9-epub-ahead-of-print
#5
Wen-Sen Lee, Po-Ren Hsueh, Tai-Chin Hsieh, Fu-Lun Chen, Tsong-Yih Ou, Shio-Shin Jean
No abstract text is available yet for this article.
February 6, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28169011/investigation-of-outbreaks-of-pneumocystis-jirovecii-pneumonia-in-two-scottish-renal-units
#6
T Inkster, S Dodd, R Gunson, L Imrie, E Spalding, S Packer, C Deighan, C Daly, J Coia, T Imtiaz, C McGuffie, R Wilson, A M Bal
Pneumocystis jirovecii is recognized as an opportunistic pathogen. In recent years, human-to-human transmission of P. jirovecii has been demonstrated. However, outbreaks of P. jirovecii infections are not well defined because the epidemiological setting that facilitates transmission is not fully understood. This article describes two outbreaks of P. jirovecii pneumonia (PCP) in renal transplant patients in the West of Scotland. In total, 25 patients in two geographically contiguous locations were affected...
November 18, 2016: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28143789/comparison-of-a-commercial-real-time-pcr-assay-realcycler%C3%A2-pjir-kit-progenie-molecular-to-an-in-house-real-time-pcr-assay-for-the-diagnosis-of-pneumocystis-jirovecii-infections
#7
Thibaud Guillaud-Saumur, Gilles Nevez, Amélie Bazire, Michèle Virmaux, Nicolas Papon, Solène Le Gal
We compared the RealCycler® PJIR kit (Progenie Molecular), available in Europe, to an in-house real-time PCR assay for the diagnosis of Pneumocystis jirovecii infections. Excellent agreement was found (concordance rate, 97.4%; Cohen's kappa, 0.918>0.8) showing that this commercial assay represents an alternative method for the diagnosis of P. jirovecii infections.
January 23, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28121925/prospective-etiological-investigation-of-community-acquired-pulmonary-infections-in-hospitalized-people-living-with-hiv
#8
Claudia Figueiredo-Mello, Pontus Naucler, Marinella D Negra, Anna S Levin
The study of the etiological agents of community-acquired pulmonary infections is important to guide empirical therapy, requires constant updating, and has a substantial impact on the prognosis of patients. The objective of this study is to determine prospectively the etiology of community-acquired pulmonary infections in hospitalized adults living with HIV. Patients were submitted to an extended microbiological investigation that included molecular methods. The microbiological findings were evaluated according to severity of the disease and pneumococcal vaccine status...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28115507/overcoming-hurdles-to-vaccine-development-against-pneumocystis-jirovecii
#9
Beth A Garvy
Development of Pneumocystis pneumonia (PCP) is a common problem among immunosuppressed individuals. There are windows of opportunity in which vaccination would be beneficial, but to date, no vaccines have made it to clinical trials. Significant hurdles to vaccine development include a host range specificity making it difficult to translate from animal models to humans. Discovery of cross-reactive epitopes are critical to moving vaccine candidates from pre-clinical animal studies to clinical trials.
January 23, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28115045/-life-threatening-pneumocystis-pneumonia-in-a-previously-healthy-pregnant-woman
#10
Sara Trier-Mørch, Nicki Broholm Holst Sørensen, Martin Rostgaard-Knudsen, Helle Larsen, Anne Nødgaard Sørensen
Pneumocystis pneumonia (PCP) is one of the most common infections in patients with HIV. Pneumocystis jirovecii rarely gives rise to symptoms in immunocompetent individuals. PCP has been reported in individuals with immunosuppression. We report a case of life-threatening PCP in an otherwise healthy pregnant woman. Pregnant patients should be considered to be relatively immunosuppressed, and more opportunistic infections should be included in differential diagnosis considerations.
January 16, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28106902/bone-marrow-infection-by-pneumocystis-jirovecii
#11
Kanokorn Lerdlamyong, Sanya Sukpanichnant, Pinyo Rattanaumpawan
No abstract text is available yet for this article.
January 20, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28103460/-pneumocystis-pneumonia-in-107-hiv-infected-patients-admitted-to-the-department-of-infectious-diseases-at-santa-maria-hospital-lisbon-2002-2013
#12
Vilma Grilo, Aida Pereira
INTRODUCTION: Pneumocystis jirovecii pneumonia remains one of the most common opportunistic illnesses in patients infected with the human immunodeficiency virus. It is currently the most reported AIDS-defining infection in Portugal. The aims of this study were to analyze the features of a human immunodeficiency virus /Pneumocystis jirovecii pneumonia coinfected population, to compare it with the current literature, and to evaluate comparatively subpopulations of patients based on the previous knowledge of the human immunodeficiency virus infection, Pneumocystis jirovecii pneumonia diagnostic method and discharge results...
October 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28062161/-rapid-diagnostic-test-for-respiratory-infections
#13
José María Marimón, José María Navarro-Marí
Acute respiratory infections are the second cause of morbidity and mortality in children and adults worldwide, being viruses, bacteria and fungi involved in their etiology. The rapid diagnosis allows for a better clinical management of the patient, for adopting public health measures and for controlling possible outbreaks. The main etiologic agents can be diagnosed within the first hours after the onset of symptoms with antigen detection techniques, primarily immunochromatography. Results are obtained in 15-30minutes, with 70-90% sensitivity and >95% specificity for the diagnosis of Streptococcus pneumoniae and Legionella pneumophila serogroup O1 infections from urine, Streptococcus pyogenes from throat swabs and respiratory syncytial virus from nasopharyngeal aspirates...
January 3, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28050417/diffuse-parenchymal-lung-diseases-with-clinicoradiological-discordance-role-of-transbronchial-lung-biopsy-as-a-diagnostic-tool-an-observational-study
#14
K P Suraj, Kiran Vishnu Narayan, Jyothi Edakalavan, Neethu Kesava Kumar
INTRODUCTION: The diagnosis of Diffuse Parenchymal Lung Disease (DPLD) requires a multidisciplinary approach with reconciliation of clinicoradiological and histopathological data. But when the preliminary clinicoradiological profile fails to suggest a diagnosis, an adequate lung biopsy specimen with meticulous histological examination and a multidisciplinary approach usually yields results. There is also a high chance of sampling error due to patchy and heterogeneous involvement of the disease process and due to the small volume of tissue taken...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28049128/immune-reconstitution-inflammatory-syndrome-associated-with-pulmonary-pathogens
#15
REVIEW
Radha Gopal, Rekha R Rapaka, Jay K Kolls
Immune reconstitution inflammatory syndrome (IRIS) is an exaggerated immune response to a variety of pathogens in response to antiretroviral therapy-mediated recovery of the immune system in HIV-infected patients. Although IRIS can occur in many organs, pulmonary IRIS, associated with opportunistic infections such as Mycobacterium tuberculosis and Pneumocystis jirovecii, is particularly associated with high morbidity and mortality. The pathology of IRIS is associated with a variety of innate and adaptive immune factors, including CD4(+) T-cells, CD8(+) T-cells, γδ T-cells, natural killer cells, macrophages, the complement system and surfactant proteins, Toll-like receptors and pro-inflammatory cytokines and chemokines...
January 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28035717/the-role-of-cd4-cell-count-as-discriminatory-measure-to-guide-chemoprophylaxis-against-pneumocystis-jirovecii-pneumonia-in-human-immunodeficiency-virus-negative-immunocompromised-patients-a-systematic-review
#16
Peter E Messiaen, Senne Cuyx, Tom Dejagere, Jeroen C Van der Hilst
BACKGROUND: In recent years, the incidence of Pneumocystis jirovecii pneumonia (PJP) has increased in immunocompromised patients without human immunodeficiency virus (HIV) infection. Chemoprophylaxis with trimethoprim-sulfamethoxazole (TMP-SMX) is highly effective in preventing PJP in both HIV-positive and -seronegative patients. In HIV-positive patients, the risk of PJP is strongly correlated with decreased CD4 cell count. The role of CD4 cell count in the pathogenesis of PJP in non-HIV immunocompromised patients is less well studied...
December 30, 2016: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28033170/a-rare-cause-of-cavitary-lung-lesions
#17
Nika Pierre-Louis, Brian Dlugos
Pneumocystis jirovecii pneumonia (PJP) is a common infection among susceptible patients with compromised immune function and can lead to life-threatening complications without prompt recognition and appropriate treatment. Clinicians should be aware that patients can develop severe infection even while receiving approved prophylactic medications for PJP. Furthermore, atypical radiographic findings, such as the cavitary lung lesions found in the patient in this case report, can make the diagnosis even more challenging...
January 2017: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/28031836/pulmonary-alveolar-proteinosis-a-case-report-and-world-literature-review
#18
Armando J Huaringa, Wassem H Francis
Pulmonary alveolar proteinosis (PAP) is a lung disorder which was first described in 1958 by Rosen et al. and is indeed rare disease with a prevalence of 0.1 per 100,000 individuals. PAP is characterized by abnormal accumulation of pulmonary surfactant in the alveolar space, which impairs gas exchange leading to a severe hypoxemia. Pulmonary surfactant is an insoluble proteinaceous material that is rich in lipids and stains positive with periodic acid-Schiff (PAS). The most common type of PAP is the so-called autoimmune or idiopathic type...
November 2016: Respirology Case Reports
https://www.readbyqxmd.com/read/28031260/immunization-with-pca1-protects-mice-against-pneumocystis-pneumonia-and-generates-antibody-to-pneumocystis-jirovecii
#19
Brenda L Tesini, Terry W Wright, Jane E Malone, Constantine G Haidaris, Martha Harber, Andrea J Sant, Jennifer L Nayak, Francis Gigliotti
Pneumocystis pneumonia (PcP) is a life-threatening infection that affects immunocompromised individuals. Nearly half of all PcP cases occur in those prescribed effective chemoprophylaxis, suggesting that additional preventive methods are needed. To this end, we have identified a unique mouse Pc surface protein, designated Pneumocystis cross-reactive antigen 1 (Pca1), as a potential vaccine candidate. Mice were immunized with a recombinant fusion protein containing Pca1. Subsequently, CD4(+) T cells were depleted and the mice were exposed to P...
December 28, 2016: Infection and Immunity
https://www.readbyqxmd.com/read/28018911/a-quantitative-model-to-estimate-drug-resistance-in-pathogens
#20
Frazier N Baker, Melanie T Cushion, Aleksey Porollo
Pneumocystis pneumonia (PCP) is an opportunistic infection that occurs in humans and other mammals with debilitated immune systems. These infections are caused by fungi in the genus Pneumocystis, which are not susceptible to standard antifungal agents. Despite decades of research and drug development, the primary treatment and prophylaxis for PCP remains a combination of trimethoprim (TMP) and sulfamethoxazole (SMX) that targets two enzymes in folic acid biosynthesis, dihydrofolate reductase (DHFR) and dihydropteroate synthase (DHPS), respectively...
December 2016: Journal of Fungi (Basel, Switzerland)
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