Invasive Yersiniosis in a Pediatric Patient With β-Thalassemia Major: Acute Decompensation After Rapid Blood Transfusion

Yersinia enterocolitica infection, or yersiniosis, is a common cause of gastroenteritis in developing nations, but the disease is less common in the developed world. Yersiniosis typically presents as a self-limited gastroenteritis in an immunocompetent patient and rarely progresses to the more fulminant disseminated form. Certain patient populations are at greater risk of disseminated disease, and providers caring for these patients should have heightened suspicion for invasive disease. Patients dependent on serial transfusion therapy, such as those with inherited hemoglobinopathies, often have chronically elevated serum iron levels. These patients are at increased risk of fulminant yersiniosis due to the bacteria's siderophilic nature. Yersinia infection can be devastating in these patients, and early intervention with empiric antibiotics combined with targeted resuscitation can be essential in their care. The following case illustrates the utility for heightened surveillance, early intervention, and guided resuscitation in the management of this at-risk population.
Source: Pediatric Emergency Care - Category: Emergency Medicine Tags: Illustrative Cases Source Type: research

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Publication date: Available online 14 September 2019Source: Journal of Organometallic ChemistryAuthor(s): Dilek Unluer, Ayse Aktas Kamiloglu, Sahin Direkel, Ersan Bektas, Halit Kantekin, Kemal SancakAbstractIn this work, novel metallophthalocyanine compounds (M = Zn, Cu, Co) bearing four 2-methoxy-4-{(Z)-[(4-morpholin-4-ylphenyl)imino]methyl}phenol at the peripheral positions were sythesized starting from the new phthalonitrile derivative (2). These new compounds (2–5) have been characterized by a combination of FT-IR, 1H NMR (for compounds 2 and 3), 13C NMR (for compound 2), UV–Vis (for compounds 3,4 and 5...
Source: Journal of Organometallic Chemistry - Category: Chemistry Source Type: research
Abstract Synthetic dyes are toxic and carcinogenic in nature, which also causes environmental pollution. The present study was aimed to decolorize various commercial dyes using purified recombinant bacterial laccases. Laccase gene from Yersinia enterocolitica strain 8081 (yacK), Y. enterocolitica strain 7 (yacK) and Bacillus pumilus DSKK1 was cloned in vector pET28a and overproduced in host Escherichia coli BL21. The high yield of recombinant laccase protein resulted in the formation of inclusion bodies, which were further solubilized, refolded, and purified. The purified recombinant laccases were alkali-tole...
Source: Environmental Pollution - Category: Environmental Health Authors: Tags: Environ Pollut Source Type: research
For more than twenty years, rates of campylobacteriosis in Scandinavia have been more than 50% above those of Europe as a whole. [1]. During 1995 to 2000, approximately 20-to-60 cases per 100,000 were reported in Denmark, Finland, Norway and Sweden; increasing to 60-to-100 cases per 100,000 during 2010 to 2018. [2]  Similar regional trends have been reported for EHEC (enterohemorrhagic E. coli) infection; while rates of yersiniosis have been decreasing. Sweden = Laboratory reports     other countries = Cases References: 1. Berger S. Campylobacteriosis: Global Status, 2019. 157 pages , 102 graphs , 1,...
Source: GIDEON blog - Category: Databases & Libraries Authors: Tags: Ebooks Epidemiology ProMED Source Type: blogs
Authors: Picking WD, Barta ML Abstract Type III secretion systems are used by some Gram-negative bacteria to inject effector proteins into targeted eukaryotic cells for the benefit of the bacterium. The type III secretion injectisome is a complex nanomachine comprised of four main substructures including a cytoplasmic sorting platform, an envelope-spanning basal body, an extracellular needle and an exposed needle tip complex. Upon contact with a host cell, secretion is induced, resulting in the formation of a translocon pore in the host membrane. Translocon formation completes the conduit needed for effector secret...
Source: Current Topics in Microbiology and Immunology - Category: Microbiology Tags: Curr Top Microbiol Immunol Source Type: research
Abstract Acute diarrhea is an important public health issue. Here, we focused on the differences of enteropathogens in acute diarrhea between urban and rural areas in southeast China. Laboratory- and sentinel-based surveillance of acute diarrhea (≥ 3 loose or liquid stools/24 hours) was conducted at 16 hospitals. Fecal specimens were tested for bacterial (Aeromonas sp., Campylobacter sp., diarrheagenic Escherichia coli, Plesiomonas shigelloides, non-typhoidal Salmonella, Shigella sp., Vibrio sp., and Yersinia sp.) and viral (adenovirus, astrovirus, Norovirus, Rotavirus, and Sapovirus) pathogens. Descriptive sta...
Source: Am J Trop Med Hyg - Category: Infectious Diseases Authors: Tags: Am J Trop Med Hyg Source Type: research
ConclusionAltogether, our data suggested that loxapine might suppress intracellular bacteria through inhibiting of bacterial efflux pumps. In light of its unique activity, loxapine represents a promising lead compound with translational potential for the development of a new antibacterial agent against intracellular bacteria.
Source: Journal of Microbiology, Immunology and Infection - Category: Microbiology Source Type: research
CONCLUSION: Altogether, our data suggested that loxapine might suppress intracellular bacteria through inhibiting of bacterial efflux pumps. In light of its unique activity, loxapine represents a promising lead compound with translational potential for the development of a new antibacterial agent against intracellular bacteria. PMID: 31239204 [PubMed - as supplied by publisher]
Source: Journal of Microbiology, Immunology, and Infection - Category: Microbiology Authors: Tags: J Microbiol Immunol Infect Source Type: research
Abstract Type III secretion systems (T3SS) play a crucial role for virulence in many Gram-negative bacteria. After tight bacterial contact to host cells, the T3SS injects effector proteins into the host cells, which leads to cell invasion, tissue destruction and/or immune evasion. Over the last decade several attempts were made to characterize the host-cell interactions which precede and determine effector protein injection during infection. The development of the TEM-β-lactamase reporter was an important breakthrough to achieve this goal. By this means it was demonstrated that during infection with many Gram...
Source: International Journal of Medical Microbiology - Category: Microbiology Authors: Tags: Int J Med Microbiol Source Type: research
z M Abstract Bacteria often express numerous virulence factors. These virulence factors make them successful pathogens, by e.g. mediating attachment to host cells and thereby facilitating persistence or invasion, or by contributing to the evasion of the host immune system to allow proliferation and spread within the host and in the environment. The site of first contact of Gram negative bacteria with the host is the bacterial outer membrane (OM). Consisting of an asymmetrical lipid bilayer with phospholipids forming the inner, and lipopolysaccharides forming the outer leaflet, the OM harbors numerous integral memb...
Source: International Journal of Medical Microbiology - Category: Microbiology Authors: Tags: Int J Med Microbiol Source Type: research
AbstractMature pore-forming OmpF protein from the outer membrane ofYersinia pseudotuberculosis was expressed inEscherichia coli in the form of inclusion bodies (IBs) under different cultivation conditions. The properties and structural organization of the IBs as well as the structure of the recombinant porin (rOmpF) solubilized from the IBs were investigated using electron microscopy, dynamic light scattering, optical spectroscopy, and specific hydrophobic dyes. The size, shape, and stability of the IBs under denaturing solutions were determined. It was found that the IBs were readily soluble in SDS and more resistant to u...
Source: Biochemistry (Moscow) - Category: Biochemistry Source Type: research
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