Hyperinfection with Strongyloides stercoralis presenting as acute abdomen in a patient on corticosteroid therapy: A case report.

Infection with Strongyloides stercoralis, a human pathogenic roundworm, is common in tropical countries like India. Owing to its variable clinical presentation and irregular larval output in stool, it often remains neglected and underdiagnosed. Signs and symptoms are largely dependent on the immune status of the infected individual. Alteration in the host immunity due to chronic use of steroids can surge the number of parasites and cause hyperinfection syndrome. This can be catastrophic with a fatal outcome. Focus on early detection and treatment of the parasite in at-risk patients is imperative to reduce mortality. We summarize here an interesting case of hyper infection syndrome of strongyloidiasis with gangrenous bowel changes later progressing to burst abdomen.

Dielectric function, critical points, and Rydberg exciton series of WSe2 monolayer.

The complex dielectric function ([Formula: see text]) of WSe2 monolayer grown by atomic layer deposition is investigated using spectroscopic ellipsometry. Band structure parameters are obtained by standard line-shape analysis of the second-energy-derivative of [Formula: see text] spectra. The fundamental band gap is observed at 2.26 eV, corresponds to transition between valence band (VB) maximum at the K point and conduction band (CB) minimum at Q point in the Brillouin zone (BZ). Two strong so-called A and B excitonic peaks in [Formula: see text] spectra originate from vertical transitions from spin-orbit split (0.43 eV) VB to CB at K point of the BZ. Binding energies of A and B exactions are 0.71 and 0.28 eV, respectively. Well resolved five excited excitons states has been detected within the spectral region between A and B. Energy profile of the Rydberg series shows significant deviation from the hydrogenic behavior, discussed in connection with the 2D hydrogen model. Results presented here will improve our understanding about the optical response of 2D materials and will help to design better optoelectronic applications and validate theoretical considerations.

Influence of local structure on magnetic properties of layered cobaltites PrBaCo2O(5+δ), δ > 0.5.

The effect of local structure on the magnetic and transport properties of the layered perovskites has been investigated. The samples PrBaCo(2)O(5+δ), (δ = 0.80 and 0.67) crystallize in the same 112 type tetragonal structure but have different magnetic ground states. Extended x-ray absorption fine structure (EXAFS) spectroscopy has been employed to explain the changes in magnetic interactions based on the rotation and tilting of CoO polyhedra in these oxygen-rich double perovskites.