Performance of CO1 and ITS2 nested PCR in molecular identification of ordinary scabies (Sarcoptes scabiei var. hominis)

Scabies is a global disease with a high prevalence, causing morbidity and even mortality, especially in poor and developing countries. However, it is often misdiagnosed due to varied and unspecified lesions. The gold standard technique for diagnosis is a microscopic examination, which requires experienced experts in finding mites, mainly in ordinary scabies. CO1 and ITS2 genes have been widely used in molecular identification to detect Sarcoptes scabiei and its variants. This study aimed to determine and compare the sensitivity and specificity of CO1 and ITS2 S. scabiei genes to the microscopic examination of scabies skin scrapings. The skin scrapings of 52 subjects with scabies diagnosed by anamnesis, physical examination, and dermoscopic examination were examined under a microscope and analyzed by nested PCR. The diagnostic test result showed that the sensitivity of nested PCR of both CO1 and ITS2 genes to micro‐ scope examination was 100%. However, the specificity of both CO1 and ITS2 nested PCR was poor (24% and 0%). Hence, CO1 and ITS2 nested PCR could be more suitable for screening ordinary scabies in humans than the microscopic examination.

Neonatal Septicemia and Drug Resistance; 2 Year Prospective Study

Neonatal sepsis is a worldwide problem with the prevalence at 1 to10 per 1000 live birth and one of the indicator for measuring the health status of a nation. According to WHO there are about 5 million neonatal death per year with 98% occurring in developing countries. Antimicrobial resistance is a growing threat worldwide. Blood culture is considered as the gold standard technique for diagnosis of neonatal septicemia. The main objectives includes, to know the various bacteria causing neonatal septicemia and their antibiogram. To detect drug resistance among the isolated bacteria. A Prospective study was done over a period of 2 year. Blood samples for culture were collected aseptically before starting antibiotic therapy and subcultures were performed. The isolates were identified by standard biochemical tests and antibiogram of the isolates were studied. Out of 360 cases 160 were bacteriologically positive, Klebsiella was the most common organism isolated (21%), followed by Staphylococcus aureus (20%) Acinetobacter (15%), Pseudomonas (13%). Maximum sensitivity was seen by Linezolid, Erythromycin for Gram positive organisms and Gram negative organisms were sensitive to Piperacillin/ Tazobactum, Imipenem, Levofloxacin, Meropenem. Knowledge of likely causative organism causing neonatal septicemia can help in instituting prompt and appropriate therapy which in turn reduce morbidity and mortality.

High sensitivity-low cost detection of SARS-CoV-2 by two steps end point RT-PCR with agarose gel electrophoresis visualization

More than one year since Coronavirus disease 2019 (COVID-19) pandemic outbreak, the gold standard technique for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) detection is still the RT-qPCR. This is a limitation to increase testing capacities, particularly at developing countries, as expensive reagents and equipment are required. We developed a two steps end point RT-PCR reaction with SARS-CoV-2 Nucleocapsid (N) gene and Ribonuclease P (RNase P) specific primers where viral amplicons were verified by agarose gel electrophoresis. We carried out a clinical performance and analytical sensitivity evaluation for this two-steps end point RT-PCR method with 242 nasopharyngeal samples using the CDC RT-qPCR protocol as a gold standard technique. With a specificity of 95.8%, a sensitivity of 95.1%, and a limit of detection of 20 viral RNA copies/uL, this two steps end point RT-PCR assay is an affordable and reliable method for SARS-CoV-2 detection. This protocol would allow to extend COVID-19 diagnosis to basic molecular biology laboratories with a potential positive impact in surveillance programs at developing countries.

How to Measure Intraocular Pressure: An Updated Review of Various Tonometers

Intraocular pressure (IOP) is an important measurement that needs to be taken during ophthalmic examinations, especially in ocular hypertension subjects, glaucoma patients and in patients with risk factors for developing glaucoma. The gold standard technique in measuring IOP is still Goldmann applanation tonometry (GAT); however, this procedure requires local anesthetics, can be difficult in patients with scarce compliance, surgical patients and children, and is influenced by several corneal parameters. Numerous tonometers have been proposed in the past to address the problems related to GAT. The authors review the various devices currently in use for the measurement of intraocular pressure (IOP), highlighting the main advantages and limits of the various tools. The continuous monitoring of IOP, which is still under evaluation, will be an important step for a more complete and reliable management of patients affected by glaucoma.

Closure Techniques

The superficial location of the radial artery access site eliminates the need for overly specialized closure devices. Manual compression is considered the gold standard technique. Closure devices in their many iterations are designed to work by applying continuous pressure using an adjustable balloon. They are arguably superior to manual compression as they exert a continuous and gentle pressure on the artery. The simplest, and cheapest devices might be the best ones. A good closure technique ensures compression with a “just needed” intensity to maintain anterograde flow. A good technique also incorporates the principle of patent hemostasis with or without prophylactic ulnar artery occlusion while keeping the whole process relatively simple. These techniques result in fewer radial artery occlusions and other complications. Lower complications ensure patency of the radial artery for future procedures.

Shear Wave Elastography in Evaluating Acute Kidney Allograft Dysfunction: Preliminary Results.

In absence of pharmacological toxicity, allograft dysfunction is usually due to parenchymal inflammation and tubulointerstitial fibrosis, but its clinical signs are often non-specific and tend to appear when advanced damage has been established. We investigated whether Shear Wave Elastography (SWE), a new non-invasive ultrasound (US) based technique that estimates tissue stiffness, could provide early confident diagnosis of acute allograft dysfunction compared to biopsy (gold standard technique).

Selective-sampling Raman Imaging techniques for ex-vivo assessment of surgical margins in cancer surgery

One of the main challenges in cancer surgery is to ensure the complete excision of the tumour while sparing as much healthy tissue as possible. Histopathology, the gold-standard technique used...

Clinical Case Employing Two Different Biomaterials in Bone Regeneration

The case of a 59-year-old woman lacking bone in the lower left side of her mandible, and treated with two different biomaterials for bone regeneration, is reported here. Specifically, two different anatomical sites damaged by two different pathologies were studied: a radicular fracture and peri-implantitis. The sites were treated via xenograft bone substitute and calcium phosphosilicate, respectively. Follow-up evaluations showed that the two different methodologies employing different materials in the same organism undergoing the same metabolic processes achieved the same good results. This represents a significant change in current surgical strategies for the dental region: instead of focusing on a single gold-standard technique, it is possible to follow a hybrid approach by adapting the biomaterial and the protocol used to the specificities of the defect.

Isolated Arthroscopic Radial Styloidectomy: The Three-Portal Approach

Background The current gold-standard technique for radial styloidectomy is arthroscopic. The use of only two dorsal portals may not allow a crystal-clear view of the dorsal arthritic rim of the radius because of the dorsal capsule synovitis. Objectives To propose a new technique for isolated arthroscopic radial styloidectomy. The addition of a volar radial portal and a sequential procedure are presented. Patients and Methods Two trochars for alternatively viewing from volar radial or 3–4 are used. A 1–2 portal is used for instrumentation with a motorized burr. We have been using the three-portal technique in 34 cases (26 isolated). Results This modification of the classic arthroscopic radial styloidectomy is technically easy and the view of the dorsal rim of the radius provides a clear definition and treatment of the dorso-radial arthritic pathology. Conclusions The authors recommend this technical trick to perform an easy and comprehensive isolated palliative or curative arthroscopic radial styloidectomy.