Background: Children with neurodevelopmental disabilities (NDDs, e.g., cerebral palsy) and their caregivers face lifelong and impactful challenges, particularly during life-transition periods such as adolescence.
View Article and Find Full Text PDFCryptococcus neoformans is an encapsulated yeast that primarily causes a life-threatening meningoencephalitis in immunosuppressed individuals especially those with HIV/AIDS. Its main virulence factor is its polysaccharide capsule which interferes with complement-mediated phagocytosis. C.
View Article and Find Full Text PDFDematiaceous fungi are an opportunistic pathogen seen in solid organ transplant recipients. We report 2 cases of Exophiala infection and review the medical literature to summarize the spectrum of disease this pathogen can cause in this patient population.
View Article and Find Full Text PDFBacillus cereus is a Gram-positive aerobic or facultatively anaerobic, motile, spore-forming, rod-shaped bacterium that is widely distributed environmentally. While B. cereus is associated mainly with food poisoning, it is being increasingly reported to be a cause of serious and potentially fatal non-gastrointestinal-tract infections.
View Article and Find Full Text PDFHistoplasma capsulatum is a common opportunistic pathogen that often causes disseminated infection among AIDS patients from endemic areas. Virtually any organ system can be affected, but biliary involvement has not been described. We report the first case of AIDS cholangiopathy associated with H.
View Article and Find Full Text PDFPurpose: Pseudomonas aeruginosa ocular infections most frequently originate from an environmental source; successful treatment with various ocular antibiotics is well established. However, emergence of resistant clones to available antibiotics poses a real threat to successful treatment. The purpose of this study was to evaluate the antibiotic susceptibilities of 100 random clinical isolates of P.
View Article and Find Full Text PDFDiagn Microbiol Infect Dis
February 2006
Vibrio cholerae are Gram-negative bacteria capable of producing serious infections. They are differentiated into O1 and non-O1 serogroups, depending on their ability to agglutinate with specific antiserum. In contrast to non-O1 V.
View Article and Find Full Text PDFAnn Clin Microbiol Antimicrob
November 2005
Background: Extrapulmonary manifestations of tuberculosis have become increasingly important in the era of HIV/AIDS.
Case Presentation: We describe a case of tuberculosis (TB) dactylitis in a patient with AIDS who originated from the Ivory Coast. The diagnosis was established by direct visualization of acid-fast bacilli on joint fluid and bone biopsy of the proximal phalanx.
Purpose: To describe the microbiologic diagnosis of putative Mycobacterium chelonae keratitis in a soft contact lens wearer by initial evaluation of Gram- and Kinyoun (acid fast)-stained smears of fluid from patient's contact lens care system.
Methods: Corneal ulcer of suspected Acanthamoeba etiology developed in a 28-year-old soft contact lens wearer. After corneal scrapings were negative, microbiologic consultation led to evaluation of stained smears and culture of fluid from patient's contact lens care system.
Primary cutaneous infection with Chrysosporium, a saprophytic fungus commonly found in soil, is believed to be very rare, with only two previously reported cases. We present a case of localized cutaneous Chrysosporium in an immunocompromised heart transplant patient. Considering that the histology of the skin in this case is superimposable on that seen in pulmonary Chrysosporium known as adiaspiromycosis, we regard the cutaneous variant in the absence of pulmonary disease as a distinct dermatologic entity.
View Article and Find Full Text PDFA 57-year-old male with a history of hypercholesterolemia and anxiety but otherwise in good health volunteered to donate the right lobe of his liver to his brother. The operation was performed uneventfully, without transfusion. Postoperatively he did well, until he developed tachycardia, profound hypotension, and coffee ground emesis on postoperative day 3.
View Article and Find Full Text PDFOral Surg Oral Med Oral Pathol Oral Radiol Endod
September 2004
Under certain permissive circumstances, normally occurring fusiform bacteria and Borrelia spirochetes can result in a symbiotic overgrowth that leads to necrotic oral ulcers (stomatitis), gingivitis, and periodontitis. These lesions are collectively known as oral fusospirochetosis and may be under-appreciated in patients with HIV infection and AIDS. Fusospirochetal oral ulcers in patients with HIV are often large, necrotic, and malodorous; they respond completely to penicillin.
View Article and Find Full Text PDFThe effectiveness of five 30-second handwashes with a non-antiseptic lotion soap to remove nosocomial pathogens (10(8) CFU) applied to fingertips was studied. CFU for all species dropped rapidly after the first handwash; persistence (10 to 15 CFU) was maintained thereafter. Wiping hands with an antiseptic (70% isopropyl or 10% povidone-iodine) sponge removed persisters.
View Article and Find Full Text PDFWe describe a patient with extranodal non-Hodgkin lymphoma who developed systemic candidiasis after treatment with a cyclophosphamide-based chemotherapy regimen. Histologically, the fungal organisms demonstrated markedly enlarged blastoconidia with a variety of morphologic forms, mimicking other mycotic organisms, such as Cryptococcus neoformans, Blastomyces dermatitidis, and Paracoccidioides brasiliensis. The in vivo occurrence of such giant forms is rare, and when observed histologically may result in an erroneous diagnosis or a diagnosis of multiple mycotic organisms.
View Article and Find Full Text PDFObjective: To demonstrate the effects of meconium on growth of bacterial pathogens, which are common causes of intra-amniotic infection and neonatal sepsis.
Methods: Meconium collected from 9 healthy neonates was suspended as a 20% solution using sterile saline. In experiment 1, separate test tubes of meconium solution and sterile saline (the control) were individually inoculated with 10(6) colony-forming units of a single species of the following test pathogens: Escherichia coli, Enterococcus faecalis, Group B Streptococcus, Staphylococcus aureus, Pseudomonas aeruginosa, and Listeria monocytogenes.
A compound produced by Bacillus pumilus (MSH) that inhibits Mucoraceae and Aspergillus species is described. Fungicidal activity was demonstrated by lawn-spotting and by diffusion through 0.45 microm Millipore membranes placed on 5 % sheep-blood agar, nutrient agar, trypticase soy agar and Mueller-Hinton agar, followed by spore inoculation of the bacterium-free underlying agar surface.
View Article and Find Full Text PDFObjective: To determine whether the ear tips of dedicated stethoscopes (DS) that are used on patients prescribed contact precautions for methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant Enterococcus faecium, or multiple antibiotic-resistant Acinetobacter baumannii become contaminated with these micro-organisms.
Design: Culture of DS ear tips.
Setting: A 524-bed tertiary care university hospital.
Toxoplasma gondii is an opportunistic parasite that can cause severe disease in immunosuppressed individuals. We report a case of unsuspected T. gondii empyema in a bone marrow transplant recipient that was diagnosed by the visualization of numerous intracellular and extracellular tachyzoites in Giemsa- and Gram-stained smears.
View Article and Find Full Text PDFRenal abscess is uncommon in pediatrics and is rarely a cause of fever of unknown origin. We recently cared for a patient who presented with a 3-week history of fever. An indium scan ultimately led to the diagnosis of a renal abscess.
View Article and Find Full Text PDFYersinia enterocolitica comprises both pathogenic and nonpathogenic members. Distinguished by biogrouping, serogrouping, and ecological distribution, commonly occurring pathogenic serobiogroups, e.g.
View Article and Find Full Text PDFDiagn Microbiol Infect Dis
May 1999
Candida albicans normally produces blastoconidia measuring 2 to 8 microns in diameter. Markedly enlarged "giant" (approximately 30 microns) blastoconidia of a C. albicans isolate (designated BH) were observed after growth on commercially prepared chocolate agar already supplemented with IsoVitalex (BBL-Microbiology Systems, Cockeysville, MD, USA).
View Article and Find Full Text PDFDiagn Microbiol Infect Dis
January 1999
Two nonhemolytic, mucoid, encapsulated strains of Enterococcus faecalis lacked lethality for 23 white mice when inoculated (10(9) cells/mL) intraperitoneally. Bacteremia was short lived (2 to 3 days), but peritoneal cultures remained positive for 7 days postinoculation. Although encapsulation did not result in animal lethality, encapsulation may have delayed peritoneal clearance by interference with phagocytosis.
View Article and Find Full Text PDFCryptococcus neoformans has become a significant opportunistic pathogen, accounting for 8-10% of infectious complications in patients with AIDS. When encapsulated yeast cells are observed in Giemsa-stained smears of bronchoalveolar washings (BAL), or induced sputum specimens, confirmation as C. neoformans is germane to definitive therapy.
View Article and Find Full Text PDFHyphal growth in filamentous fungi proceeds in an unidirectional radial pattern from a point inoculation. An inhibitor produced, secreted, and absorbed by the advancing hyphae has been speculated to account for directional growth. Working with Mucor and Aspergillus, laboratory evidence is provided for the production of an inhibitory by the advancing hyphae of these filmentous fungi that precludes back growth.
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