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Immunocompromised infections

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https://www.readbyqxmd.com/read/29341586/development-of-a-novel-cytopathic-effect-based-phenotypic-screening-assay-against-cryptosporidium
#1
Alexander T Chao, Boon Heng Lee, Kah Fei Wan, Jeremy Selva, Bin Zou, Peter Gedeck, David Beer, Thierry T Diagana, Ghislain Bonamy, Ujjini H Manjunatha
Cryptosporidiosis is a diarrheal disease predominantly caused by Cryptosporidium parvum (Cp) and Cryptosporidium hominis (Ch), apicomplexan parasites which infect the intestinal epithelial cells of their human hosts. The only approved drug for cryptosporidiosis is nitazoxanide, which shows limited efficacy in immunocompromised children, the most vulnerable patient population. Thus, new therapeutics and in vitro infection models are urgently needed to address the current unmet medical need. Toward this aim, we have developed novel cytopathic effect (CPE)-based Cp and Ch assays in human colonic tumor (HCT-8) cells and compared them to traditional imaging formats...
January 17, 2018: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29339831/detection-of-antimicrobial-resistance-genes-associated-with-the-international-space-station-environmental-surfaces
#2
C Urbaniak, A Checinska Sielaff, K G Frey, J E Allen, N Singh, C Jaing, K Wheeler, K Venkateswaran
Antimicrobial resistance (AMR) is a global health issue. In an effort to minimize this threat to astronauts, who may be immunocompromised and thus at a greater risk of infection from antimicrobial resistant pathogens, a comprehensive study of the ISS "resistome' was conducted. Using whole genome sequencing (WGS) and disc diffusion antibiotic resistance assays, 9 biosafety level 2 organisms isolated from the ISS were assessed for their antibiotic resistance. Molecular analysis of AMR genes from 24 surface samples collected from the ISS during 3 different sampling events over a span of a year were analyzed with Ion AmpliSeq™ and metagenomics...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29338706/miliary-tuberculosis-with-co-existing-pulmonary-cryptococcosis-in-non-hiv-patient-without-underlying-diseases-a-case-report
#3
Toyomitsu Sawai, Takumi Nakao, Satoru Koga, Shotaro Ide, Sumako Yoshioka, Nobuko Matsuo, Hiroshi Mukae
BACKGROUND: Tuberculosis and cryptococcosis co-infection usually occurs in immunosuppressed patients with impaired cell-mediated immunity. However, there are few reports about such co-infection in non-HIV patients without underlying diseases. Here, we report a case of miliary tuberculosis with co-existing pulmonary cryptococcosis in non-HIV patient without underlying diseases. CASE PRESENTATION: An 84-year-old Asian female presented to our hospital with complaints of a 1-week history of abdominal pain and appetite loss...
January 16, 2018: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29337777/rescue-diverting-loop-ileostomy-an-alternative-to-emergent-colectomy-in-the-setting-of-severe-acute-refractory-ibd-colitis
#4
Tara A Russell, Aaron J Dawes, Danielle S Graham, Stephanie A K Angarita, Christina Ha, Jonathan Sack
BACKGROUND: Severe acute refractory colitis has traditionally been an indication for emergent colectomy in IBD, yet under these circumstances patients are at elevated risk for complications because of their heightened inflammatory state, nutritional deficiencies, and immunocompromised state. OBJECTIVE: We hypothesized that rescue diverting loop ileostomy may be a viable alternative to emergent colectomy, providing the opportunity for colonic healing and patient optimization before more definitive surgery...
February 2018: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/29337704/the-what-when-and-how-in-performing-and-interpreting-microbiological-diagnostic-tests-in-skin-and-soft-tissue-infections
#5
Carolina Navarro-San Francisco, Patricia Ruiz-Garbajosa, Rafael Cantón
PURPOSE OF REVIEW: To summarize and classify the most recent and relevant microbiological studies for each type of skin and soft tissue infection (SSTI). RECENT FINDINGS: Following Infectious Diseases Society of America and Food and Drug Administration classifications of SSTIs, we differentiate between two large groups, the superficial or uncomplicated infections and the complicated infections with deep involvement. It is not usually necessary to obtain microbiological samples in uncomplicated infections, except in cases of recurrences or for epidemiological control purposes...
January 11, 2018: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/29337163/utility-of-ultra-deep-sequencing-for-detection-of-varicella-zoster-virus-antiviral-resistance-mutations
#6
Mélanie Mercier-Darty, David Boutolleau, Raphaël Lepeule, Christophe Rodriguez, Sonia Burrel
We report the first application of ultra-deep sequencing (UDS) to varicella-zoster virus (VZV) genotypic antiviral testing in a case of acyclovir-resistant VZV infection initially detected by Sanger sequencing within a deeply immunocompromised heart transplant recipient. As added-value compared to Sanger analysis, UDS revealed complex dynamics of viral population under antiviral pressure. Varicella-zoster virus (VZV) is a ubiquitous human herpesvirus affecting populations worldwide. VZV is commonly acquired in youth whose primary infection usually manifests as benign varicella (chickenpox)...
January 11, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29332650/amplification-of-hsp-65-gene-and-usage-of-restriction-endonuclease-for-identification-of-non-tuberculous-rapid-grower-mycobacterium
#7
Ajoy Kumar Verma, Rohit Sarin, Vijay Kumar Arora, Gavish Kumar, Jyoti Arora, Paras Singh, Vithal Prasad Myneedu
BACKGROUND: The rapid grower mycobacteria have emerged as significant group of human pathogen amongst the Runyon group IV organisms that are capable of causing infection in both the healthy and immunocompromised hosts. Study aimed to identification of species amongst rapid grower non tuberculous mycobacterial isolates by polymerase chain reaction - restriction enzyme analysis (PRA). Analysis and comparison of results with standard biochemical tests. METHODS: Rapid grower non tuberculous mycobacteria had been collected from liquid culture section during the study period...
January 2018: Indian Journal of Tuberculosis
https://www.readbyqxmd.com/read/29332319/treatment-of-latent-tuberculosis-infection-and-its-clinical-efficacy
#8
REVIEW
Hyung Woo Kim, Ju Sang Kim
The role of the treatment for latent tuberculosis infection (LTBI) has been underscored in the intermediate tuberculosis (TB) burden countries like South Korea. LTBI treatment is recommended only for patients at risk for progression to active TB-those with frequent exposure to active TB cases, and those with clinical risk factors (e.g., immunocompromised patients). Recently revised National Institute for Health and Care Excellence (NICE) guideline recommended that close contacts of individuals with active pulmonary or laryngeal TB, aged between 18 and 65 years, should undergo LTBI treatment...
January 2018: Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/29330674/advances-in-serological-imaging-techniques-and-molecular-diagnosis-of-toxoplasma-gondii-infection
#9
REVIEW
Ali Rostami, Panagiotis Karanis, Shirzad Fallahi
BACKGROUND: Toxoplasmosis is worldwide distributed zoonotic infection disease with medical importance in immunocompromised patients, pregnant women and congenitally infected newborns. Having basic information on the traditional and new developed methods is essential for general physicians and infectious disease specialists for choosing a suitable diagnostic approach for rapid and accurate diagnosis of the disease and, consequently, timely and effective treatment. METHODS: We conducted English literature searches in PubMed from 1989 to 2016 using relevant keywords and summarized the recent advances in diagnosis of toxoplasmosis...
January 12, 2018: Infection
https://www.readbyqxmd.com/read/29327700/disseminated-cutaneous-fusariosis-in-human-immunodeficiency-virus-infected-patient-and-dramatic-response-with-oral-itraconazole
#10
Indu Kumari, Satyendra Kumar Singh, Rishabh Kumar Chauhan, Satyendra Kumar Kaushal
Fusarium species are known to cause disseminated cutaneous lesions in immunocompromised patients. Some cases of fusariosis are reported in patients infected with the human immunodeficiency virus. There are two reports in such patients with systemic comorbidities like lymphoma, neutropenia and infective port-a-catheter. Another reported patient had systemic fusariosis, without skin involvement. Diagnosis and treatment of cutaneous fusariosis is difficult and resistance to antifungals is a problem. Our patient was at an advanced human immunodeficiency virus infection stage with disseminated cutaneous fusariosis, without any systemic involvement, who responded completely to oral itraconazole...
January 9, 2018: Indian Journal of Dermatology, Venereology and Leprology
https://www.readbyqxmd.com/read/29327534/gastric-angioinvasive-mucormycosis-in-immunocompetent-adult-a-rare-occurrence
#11
Mukesh Nasa, Zubin Sharma, Lipika Lipi, Randhir Sud
Mucormycosis is a rare, opportunistic fungal infection that occurs almost exclusively in immunocompromised hosts such as patients with diabetes mellitus, leukemia, lymphoma, renal disease, septicemia, burns, malnutrition, and following long-term treatment with steroids and antibiotics. Based on the clinical presentation and involvement, mucormycosis is classified as six major forms, namely, rhinocerebral, pulmonary, cutaneous, gastrointestinal (GI), disseminated and miscellaneous, with rhinocerebral and pulmonary being the common forms...
December 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29327531/isolated-pancreatic-tuberculosis-in-an-immunocompetent-host
#12
Pankaj Singhai, Ravi Gadhadh, Sangeeta Joshi, Shruti Krishnan, Aparna
Despite the high prevalence of tuberculosis (TB) worldwide, pancreatic TB is rare. When present, pancreatic TB is frequently associated with miliary TB, often in immunocompromised hosts. Pancreatic TB may present as a pancreatic abscess, acute or chronic pancreatitis, and cystic or solid pancreatic masses. This is a case of isolated Tubecular infection of the pancreas in an immunocompetent patient, who presented with a discrete pancreatic abscess, and was subsequently diagnosed with isolated pancreatic TB. This case suggests that clinicians should have a heightened suspicion of pancreatic TB when faced with discrete pancreatic lesions, especially in patients from areas where the infection is endemic...
December 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29327530/splenic-abscess-caused-by-salmonella-typhi-and-co-infection-with-leptospira
#13
Monalisa Sahu, Arvind Kumar, Neeraj Nischal, B G Bharath, Smita Manchanda, Naveet Wig
Splenic abscesses caused by Salmonella typhi are a very rare complication of typhoid fever in this era of use of specific antibiotics. Co-infection with Leptospira in such a patient is even rarer. Clinical diagnosis of splenic abscess caused by Salmonella is difficult owing to its rarity, being insidious in onset and having nonspecific clinical presentation. Splenic abscesses are potentially fatal complication of typhoid fever. In most of these patients, hemoglobinopathies or some other underlying immunocompromised state is usually present...
December 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29326525/mucormycosis-in-a-diabetic-patient-a-case-report-with-an-insight-into-its-pathophysiology
#14
Syeda Neelam Afroze, Rajani Korlepara, Guttikonda Venkateswara Rao, Jayakiran Madala
Mucormycosis is one of the most rapidly progressing and fulminant forms of fungal infection which usually begins in the nose and paranasal sinuses following inhalation of fungal spores. It is caused by organisms of the subphylum Mucormycotina, including genera as Absidia, Mucor, Rhizomucor, and Rhizopus. The incidence of mucormycosis is approximately 1.7 cases per 1,000,000 inhabitants per year. Mucormycosis affecting the maxilla is rare because of rich blood vessel supply of maxillofacial areas although more virulent fungi such as Mucor can overcome this difficulty...
October 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29326340/rare-cause-of-pulmonary-cavitation-in-a-75-year-old-man
#15
Jaffar Al-Sheikhli, Hussein Taqi, John Drake, Ayaaz Habib
A 75-year-old man of Asian descent presented to the acute medical unit with signs and symptoms suggestive of a community-acquired pneumonia. He had multiple comorbidities and was relatively immunocompromised as a result. Initial investigations supported the diagnosis of community-acquired pneumonia complicated by a cavitating lung lesion, and the patient was treated as per hospital guidelines. He continued to deteriorate despite appropriate therapy and developed a hydropneumothorax, requiring the insertion of a chest drain...
January 10, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29326229/genomic-understanding-of-an-infectious-brain-disease-from-the-desert
#16
Leandro F Moreno, Abdalla A O Ahmed, Balázs Brankovics, Christina A Cuomo, Steph B J Menken, Saad J Taj-Aldeen, Hani Faidah, J Benjamin Stielow, Marcus de M Teixeira, Francesc X Prenafeta-Boldú, Vania A Vicente, Sybren de Hoog
Rhinocladiella mackenziei accounts for the majority of fungal brain infections in the Middle East and is restricted to the arid climate zone between Saudi Arabia and Pakistan. Neurotropic dissemination caused by this fungus has been reported in immunocompromised, but also immunocompetent individuals. If untreated, the infection is fatal. Outside of humans, the environmental niche of R. mackenziei is unknown, and the fungus has been only cultured from brain biopsies. In this paper we describe the whole genome re-sequencing of two Rhinocladiella mackenziei strains from patients in Saudi Arabia and Qatar...
January 11, 2018: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29326010/genomics-of-corynebacterium-striatum-an-emerging-multi-drug-resistant-pathogen-of-immunocompromised-patients
#17
Kathleen Nudel, Xiaomin Zhao, Sankha Basu, Xiaoxi Dong, Maria Hoffmann, Michael Feldgarden, Marc Allard, Michael Klompas, Lynn Bry
OBJECTIVES: Corynebacterium striatum is an emerging multi-drug resistant (MDR) pathogen of immunocompromised and chronically ill patients. The objective of these studies was to provide a detailed genomic analysis of disease causing C. striatum and determine the genomic drivers of resistance and resistance-gene transmission. METHODS: A multi-institutional and prospective pathogen genomics program flagged seven MDR C. striatum infections occurring close in time, and specifically in immunocompromised patients with underlying respiratory diseases...
January 8, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29325543/persistent-mammalian-orthoreovirus-coxsackievirus-and-adenovirus-co-infection-in-a-child-with-a-primary-immunodeficiency-detected-by-metagenomic-sequencing-a-case-report
#18
Dagmara W Lewandowska, Riccarda Capaul, Seraina Prader, Osvaldo Zagordi, Fabienne-Desirée Geissberger, Martin Kügler, Marcus Knorr, Christoph Berger, Tayfun Güngör, Janine Reichenbach, Cyril Shah, Jürg Böni, Andrea Zbinden, Alexandra Trkola, Jana Pachlopnik Schmid, Michael Huber
BACKGROUND: We report a rare case of Mammalian orthoreovirus (MRV) infection in a child with a primary immunodeficiency (PID). Infections with Mammalian orthoreovirus are very rare and probably of zoonotic origin. Only a few cases have been described so far, including one with similar pathogenesis as in our case. CASE PRESENTATION: The patient, age 11, presented with flu-like symptoms and persistent severe diarrhea. Enterovirus has been detected over several months, however, exact typing of a positive cell culture remained inconclusive...
January 11, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29323725/serum-igg-antibodies-from-healthy-subjects-up-to-100-years-old-react-to-jc-polyomavirus
#19
Ilaria Bononi, Elisa Mazzoni, Silvia Pietrobon, Marco Manfredini, Elena Trregiani, Marika Rossini, Francesca Lotito, Giovanni Guerra, Paola Rizzo, Fernanda Martini, Mauro Tognon
JC polyomavirus (JCPyV) was identified in 1971 in the brain tissue of a patient (J.C.) affected by the progressive multifocal leukoencephalopathy (PML). JCPyV encodes for the oncoproteins large T antigen (Tag) and small t-antigen (tag). These oncoproteins are responsible of the cell transformation and tumorigenesis in experimental animals. JCPyV is ubiquitous in human populations. After the primary infection, which is usually asymptomatic, JCPyV remains lifelong in the host in a latent phase. Its reactivation may occur in heathy subjects and immunocompromised patients...
January 11, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29323188/a-tet-off-gene-expression-system-for-validation-of-antifungal-drug-targets-in-a-murine-invasive-pulmonary-aspergillosis-model
#20
Yutian Peng, Hua Zhang, Min Xu, Man-Wah Tan
Aspergillus fumigatus is one of the major causes of invasive pulmonary aspergillosis in immunocompromised patients. Novel antifungal therapy is in urgent need due to emerging resistance and adverse toxicity of current antifungal drugs. Gene products that are essential for Aspergillus viability during infection are attractive drug targets. To characterize these genes in vivo we developed a Tet-Off gene expression system in A. fumigatus, whereby the administration of doxycycline resulted in down regulation of the gene whose expression is under the control of the Tet-Off promoter...
January 11, 2018: Scientific Reports
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