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Infection, immunocompromised patients

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https://www.readbyqxmd.com/read/28732057/structural-basis-of-zn-ii-induced-metal-detoxification-and-antibiotic-resistance-by-histidine-kinase-czcs-in-pseudomonas-aeruginosa
#1
Dan Wang, Weizhong Chen, Shanqing Huang, Yafeng He, Xichun Liu, Qingyuan Hu, Tianbiao Wei, Hong Shang, Jianhua Gan, Hao Chen
Pseudomonas aeruginosa (P. aeruginosa) is a major opportunistic human pathogen, causing serious nosocomial infections among immunocompromised patients by multi-determinant virulence and high antibiotic resistance. The CzcR-CzcS signal transduction system in P. aeruginosa is primarily involved in metal detoxification and antibiotic resistance through co-regulating cross-resistance between Zn(II) and carbapenem antibiotics. Although the intracellular regulatory pathway is well-established, the mechanism by which extracellular sensor domain of histidine kinase (HK) CzcS responds to Zn(II) stimulus to trigger downstream signal transduction remains unclear...
July 21, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28730516/cryptosporidium-infection-in-children-with-cancer-undergoing-chemotherapy-how-important-is-the-prevention-of-opportunistic-parasitic-infections-in-patients-with-malignancies
#2
Reza Berahmat, Mahmoud Mahami-Oskouei, Azim Rezamand, Adel Spotin, Nayyereh Aminisani, Roghayeh Ghoyounchi, Solmaz Madadi
Cryptosporidiosis is a relatively uncommon disease in healthy individuals but could be potentially worrisome in immunocompromised patients. This study aimed to evaluate Cryptosporidium infection in children with cancer undergoing chemotherapy. A case-control study was conducted in 132 children with cancer undergoing chemotherapy and 132 non-cancer controls. The modified Ziehl-Neelsen (MZN) staining and polymerase chain reaction methods were used for the detection of Cryptosporidium parasite. All positive isolates were sequenced for phylogenetic analysis...
July 20, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28730138/ileal-perforation-with-norovirus-gastroenteritis-in-a-3-month-old-infant
#3
Seol Woo Wi, Su Jin Lee, Eun Kyeong Kang, Sung Min Cho
Noroviruses have been recognized as the leading cause of epidemic and sporadic gastroenteritis since the advent of molecular diagnostic technique. They have been documented in 5-31% of pediatric patients hospitalized with gastroenteritis. Although norovirus gastroenteritis is typically mild and self-limited, it causes severe, but sometimes fatal, conditions in the vulnerable population such as immunocompromised patients, young children, and the elderly. Bowel perforation due to norovirus infection is rare. We report a case of small bowel perforation with norovirus gastroenteritis in the infant with Down syndrome during the hospitalization with pneumonia...
June 2017: Pediatric Gastroenterology, Hepatology & Nutrition
https://www.readbyqxmd.com/read/28729142/nocardia-farcinica-brain-abscess-report-of-3-cases
#4
Ana Galacho-Harriero, Pedro D Delgado-López, Maria P Ortega-Lafont, Javier Martín-Alonso, José M Castilla-Díez, Belen Sánchez-Borge
BACKGROUND: Central nervous system nocardial infection is a rarely reported disease that usually affects patients with predisposing and debilitating conditions but also the immunocompetent population. The most common variant affecting the brain is Nocardia farcinica. Management of brain nocardiosis is troublesome and requires consideration of the severity of the underlying systemic disease, the difficulties in identifying the bacterium and the frequent delay in initiating adequate therapy...
July 17, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28727933/genotype-specific-acquisition-evolution-and-adaptation-of-characteristic-mutations-in-hepatitis-e-virus
#5
Aqsa Ikram, Mohamad S Hakim, Jian-Hua Zhou, Wenshi Wang, Maikel P Peppelenbosch, Qiuwei Pan
Hepatitis E virus (HEV) infection is a major cause of acute hepatitis but also provokes chronic infection in immunocompromised patients. Although the pathogenesis and treatment outcome involve complex interplay between the virus and host, the nature of adaptive responses of HEV to the host immune system remain obscure at best. In this study, we employed large-scale proteomic bioinformatics to profile characteristic mutations in human HEV isolates associated to ribavirin treatment failure, chronic hepatitis, hepatic failure or altered immunoreactivity...
July 20, 2017: Virulence
https://www.readbyqxmd.com/read/28724761/isg15-modulates-type-i-interferon-signaling-and-antiviral-response-during-hepatitis-e-virus-replication
#6
Harini Sooryanarain, Adam J Rogers, Dianjun Cao, Mary Etna R Haac, Yogesh A Karpe, Xiang-Jin Meng
Hepatitis E virus (HEV), a single-stranded positive-sense RNA virus, generally causes a self-limiting acute viral hepatitis, although chronic HEV infection has recently become a significant clinical problem in immunocompromised individuals especially in solid organ transplant recipients. Innate immunity, via type-I interferon (IFN) response, plays an important role during initial stages of a viral infection. ISG15, an IFN-induced ubiquitin-like protein, is known to have an immunomodulatory role, as well as can impart a direct antiviral effect against a wide spectrum of virus families...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28723706/oral-shedding-of-herpesviruses-in-hiv-patients-with-varying-degrees-of-immune-status
#7
Dirk P Dittmer, Kristen Tamburro, Huichao Chen, Anthony Lee, Marcia K Sanders, Tischan A Wade, Sonia Napravnik, Jennifer Webster-Cyriaque, Mahmoud Ghannoum, Caroline H Shiboski, Judith A Aberg
OBJECTIVE: Herpesvirus shedding in the oral cavity was analyzed to determine if presence in the oral compartment correlates with systemic changes in HIV-associated immune deficiency as measured by CD4+ counts, plasma HIV viral load (VL) and presence of AIDS-defining events. DESIGN: A5254 is a multicenter, cross-sectional, single-visit study to evaluate oral complications of HIV/AIDS and determine the association between clinical appearance, herpesvirus shedding and immune status as ascertained by CD4 count and HIV viral load...
July 18, 2017: AIDS
https://www.readbyqxmd.com/read/28723471/urinary-tract-infections-in-immunocompromised-patients-with-diabetes-chronic-kidney-disease-and-kidney-transplant
#8
REVIEW
Zafer Tandogdu, Tommaso Cai, Bela Koves, Florian Wagenlehner, Truls Erik Bjerklund-Johansen
CONTEXT: This paper provides a brief overview of urinary tract infections (UTIs) in immunocompromised patients from the perspective of a practicing urologist. OBJECTIVE: The primary objective was to provide an update on UTIs in immunocompromised patients. Diabetes mellitus (DM), chronic kidney disease, and kidney transplant (KT) are the most common clinical cases encountered by urologists. Diagnosis, management, and future research needs are summarised. EVIDENCE ACQUISITION: We conducted a nonsystematic review of the literature...
October 2016: European Urology Focus
https://www.readbyqxmd.com/read/28722598/risk-factors-for-severe-infection-hospitalization-and-prolonged-antimicrobial-therapy-in-patients-with-babesiosis
#9
Neeharik Mareedu, Anna M Schotthoefer, Jason Tompkins, Matthew C Hall, Thomas R Fritsche, Holly M Frost
Babesiosis is an emerging tick-borne disease transmitted by the hard tick Ixodes scapularis, which also transmits Lyme disease. Better gradation of prognostic indicators are needed to determine which patients may develop serious complications requiring hospitalization, and to provide early guidance on appropriate therapy. In this study, we evaluated 128 patients with smear or real time polymerase chain reaction-confirmed Babesia microti infections over a period of 16 years. Patients with asplenia or immunocompromising conditions were more likely to have severe infection (P < 0...
July 10, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28721050/the-use-of-natalizumab-for-multiple-sclerosis
#10
REVIEW
Rachel Brandstadter, Ilana Katz Sand
Natalizumab is a monoclonal antibody that acts as an α4 integrin antagonist to prevent leukocyte trafficking into the central nervous system. It is US Food and Drug Administration (FDA) approved for the treatment of relapsing-remitting multiple sclerosis (RRMS). Natalizumab demonstrated high efficacy in Phase III trials by reducing the annualized relapse rate, preventing multiple sclerosis (MS) lesion accumulation on magnetic resonance imaging, and decreasing the probability of sustained progression of disability...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28719665/risk-factors-for-hospital-acquired-infections-in-teaching-hospitals-of-amhara-regional-state-ethiopia-a-matched-case-control-study
#11
Walelegn Worku Yallew, Abera Kumie, Feleke Moges Yehuala
BACKGROUND: Hospital-acquired infection affects hundreds of millions of people worldwide. It is a major global issue for patient safety. Understanding the potential risk factors is important to appreciate the local context. A matched case control study design, which is the first of its kind in the study region, was undertaken to identify risk factors in teaching hospitals of Amhara regional state, Ethiopia. METHOD: A matched case control study design matched with age and hospital type was used...
2017: PloS One
https://www.readbyqxmd.com/read/28719322/case-report-disseminated-talaromyces-penicillium-marneffei-and-mycobacterium-tuberculosis-coinfection-in-a-japanese-patient-with-acquired-immunodeficiency-syndrome
#12
Shuji Hatakeyama, Takeshi Yamashita, Toshiyasu Sakai, Katsuhiko Kamei
Talaromyces marneffei is a dimorphic fungus endemic mainly in southeast and south Asia. It causes severe mycosis, usually in immunocompromised individuals, such as those with human immunodeficiency virus (HIV) infection. Concomitant infection with T. marneffei and other opportunistic pathogens is plausible because the majority of T. marneffei infections occur in patients with advanced HIV infection. Nonetheless, coinfection in the same site has rarely been reported, and poses a considerable diagnostic and therapeutic challenge...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719288/evaluation-of-the-protective-effect-of-deoxyribonucleic-acid-vaccines-encoding-granule-antigen-2-and-5-against-acute-toxoplasmosis-in-balb-c-mice
#13
Xiao Teng Ching, Mun Yik Fong, Yee Ling Lau
AbstractToxoplasma gondii infects a broad range of warm-blooded hosts, including humans. Important clinical manifestations include encephalitis in immunocompromised patients as well as miscarriage and fetal damage during early pregnancy. Toxoplasma gondii dense granule antigen 2 and 5 (GRA2 and GRA5) are essential for parasitophorous vacuole development of the parasite. To evaluate the potential of GRA2 and GRA5 as recombinant DNA vaccine candidates, these antigens were cloned into eukaryotic expression vector (pcDNA 3...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28718863/nya-rutiner-f%C3%A3-r-smittskydds%C3%A2-%C3%A3-tg%C3%A3-rder-vid-ehec-infektion-endast-ehec-som-b%C3%A3-r-p%C3%A3-stx2-genen-kan-kopplas-till-hus-%C3%A2-dessa-smittb%C3%A3-rare-m%C3%A3-ste-avst%C3%A3-ngas-fr%C3%A3-n-arbete-eller-f%C3%A3-rskola
#14
Peter Nolskog, Bo Svenungsson, Cecilia Jernberg
New regulations concerning EHEC/VTEC Hemolytic Uremic Syndrome (HUS) is the most severe complication to an infection with EHEC (enterohemorrhagic E. coli), also called VTEC (verocytotoxin-producing E. coli). Risk of severe complications such as HUS is an important reason why the Swedish Communicable Diseases Act (Smittskyddslag. 2004:168) includes infection with EHEC. With very few exceptions, only EHEC with the stx2 gene is associated with HUS. According to the law, persons working with unpackaged foods, infants or severely immunocompromised patients, and children attending preschool can be suspended awaiting negative test results for EHEC...
July 12, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28717096/disseminated-mycobacterium-scrofulaceum-infection-in-an-immunocompetent-host
#15
Yu Takemoto, Hirokazu Tokuyasu, Tomoyuki Ikeuchi, Hirofumi Nakazaki, Satoru Nakamatsu, Suguru Kakite, Keiichi Yamasaki
A 56-year-old woman, without any immunocompromising diseases, was referred to our hospital because of a recurrence of pyogenic spondylitis. Computed tomography revealed multiple osteolytic changes in the whole body. Vertebral magnetic resonance imaging revealed osteomyelitis and spondylitis. Mycobacterium scrofulaceum was detected in sputum cultures, in abscesses from the right knee, and in a subcutaneous forehead abscess. Therefore, the patient was diagnosed with disseminated Mycobacterium scrofulaceum infection...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28717000/empathy-burnout-and-antibiotic-prescribing-for-acute-respiratory-infections-a-cross-sectional-primary-care-study-in-the-us
#16
Bob Z Sun, Alexander Chaitoff, Bo Hu, Kathleen Neuendorf, Mahesh Manne, Michael B Rothberg
BACKGROUND: The impact of physician-patient relationship factors, such as physician empathy and burnout, on antibiotic prescribing has not been characterised. AIM: To assess associations between physician empathy and burnout and antibiotic prescribing for acute respiratory infections (ARIs) in primary care. DESIGN AND SETTING: Cross-sectional study of primary care practices in the Cleveland Clinic Health System in the US. METHOD: Patient and prescribing data were obtained from the medical record...
July 17, 2017: British Journal of General Practice: the Journal of the Royal College of General Practitioners
https://www.readbyqxmd.com/read/28716109/clinical-characteristics-and-outcomes-of-pseudomonas-aeruginosa-bacteremia-in-febrile-neutropenic-children-and-adolescents-with-the-impact-of-antibiotic-resistance-a-retrospective-study
#17
Hyo Sup Kim, Bo Kyoung Park, Seong Koo Kim, Seung Beom Han, Jae Wook Lee, Dong-Gun Lee, Nack-Gyun Chung, Bin Cho, Dae Chul Jeong, Jin Han Kang
BACKGROUND: Although the proportion of Pseudomonas aeruginosa infections has reduced after the introduction of antibiotics with anti-pseudomonal effects, P. aeruginosa bacteremia still causes high mortality in immunocompromised patients. This study determined the clinical characteristics and outcomes of P. aeruginosa bacteremia and the antibiotic susceptibilities of strains isolated from febrile neutropenic patients. METHODS: Thirty-one febrile neutropenic children and adolescents with underlying hematologic/oncologic disorders diagnosed with P...
July 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28714333/-borrelia-miyamotoi-a-recently-identified-human-pathogenic-tick-borne-relapsing-fever-spirochete
#18
Sándor Szekeres, András Lakos, Gábor Földvári
Borrelia miyamotoi is a recently described relapsing fever spirochete transmitted by ticks of the Ixodes ricinus complex. This pathogen is different from Borrelia burgdorferi sensu lato (the Lyme borreliosis spirochetes) in its epidemiology, ecology and also genetics. Over 50 patients have been described worldwide with Borrelia miyamotoi disease, and three immunocompromised patients were reported with neurological symptoms. Our knowledge about Borrelia miyamotoi infection in ticks and its distribution in different habitats and also the mechanism of the infection is limited...
July 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28712930/disseminated-mycobacterium-kansasii-infection-with-cutaneous-lesions-in-an-immunocompetent-patient
#19
Miaomiao Zhang, Mei Feng, Jian-Qing He
We reported a case of disseminated Mycobacterium Kansasii (M. kansasii) infections involving skin tissue in a 57-year-old male farmer for recurrent fever, respiratory syndromes and skin lesions. Positive findings of syndromes, laboratory examinations and M. kansasii identified in the puncture fluid indicated the diagnosis of disseminated M. kansasii infections involving skin/soft tissue, pulmonary and mediastinal lymph nodes. After applying the standard HRE regime (isoniazid (300mg/d), rifampicin (600mg/d), and ethambutol (750mg/d)), the patient's temperature normalized and symptoms relieved gradually...
July 13, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28710648/clinical-associated-characteristics-and-microbiological-features-of-bloodstream-nontyphoidal-salmonella-infection-in-adult-patients-receiving-allogeneic-hematopoietic-stem-cell-transplantation
#20
Po-Shen Ko, Yao-Chung Liu, Hao-Yuan Wang, Chia-Yun Wu, Nai-Wen Fan, Chia-Jen Liu, Yuan-Bin Yu, Liang-Tsai Hsiao, Tzeon-Jye Chiou, Cheng-Hwai Tzeng, Jin-Hwang Liu, Jyh-Pyng Gau
Bloodstream nontyphoidal salmonella (NTS) infection is rare, but its associated characteristics and microbiological features in immunocompromised patients are worth paying attention to, particularly for those receiving allogeneic hematopoietic stem cell transplantation (SCT). No studies so far have analyzed post-transplant bloodstream NTS infection. Therefore, we reviewed 423 adult patients undergoing allogeneic hematopoietic SCT from 2003 to 2014. Nine out of four hundred twenty-three patients (2.13%) developed post-transplant bloodstream NTS infection, including two patients who had subsequent or combined metastatic infections...
July 15, 2017: Annals of Hematology
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