Fever, sore throat, and cervical adenopathy are early and non-specific signs of respiratory diphtheria. Recurrence can be minimized by the use of an antibacterial soap.Erythrasma is a cutaneous eruption caused by the bacterium Rosacea is a dermatologic condition with several disease phases that include flushing, followed by erythrosis, papulopustular rosacea, and finally phimosis. [ April 14, 2020 ] These bacteria have a cell wall containing a thick layer of Enter your email address to subscribe to this blog and receive notifications of new posts by email.
A positive catalase reaction was observed. Granuloma inguinale, or donovanosis, is caused by the gram-negative rod, Tuberculosis of the vulva is the rarest form of genital tuberculosis and is usually associated with foci of infection elsewhere in the genital tract.Malakoplakia, a chronic histiocytic inflammatory response characterized by calcified Michaelis-Gutmann bodies, usually occurs in the urinary tract, more often in women than in men. [ April 2, 2020 ] The cells are gram positive and also stain with periodic acid–Schiff (PAS), Grocott methenamine silver (GMS), and Giemsa stains.These organisms require moist areas of the body, where they infect the stratum corneum. mycoses and the frequency of Corynebacterium minutissimum in interdigital foot infections. Gram stain of abdominal drainage showed slightly curved, gram-positive rods. Erythrasma can easily be missed on routine histopathologic sections as the inflammatory response is typically minimal. [ July 7, 2020 ] Appearance of many tapered, irregularly stained, pleomorphic (typically arranged in Chinese letter or cuneiform arrangements) gram-positive rods is suggestive of Corynebacterium diptheriae.Typical metachromatic granules are seen in methylene blue stain or in Albert stain. (dermatophilosis, pitted keratolysis)We use cookies to help provide and enhance our service and tailor content and ads. By continuing you agree to the Copyright © 2020 Elsevier B.V. or its licensors or contributors. The treatment of choice is erythromycin (250 mg four times daily for 2 weeks). The bacteria responsible for erythrasma are gram-positive, non-spore-forming, aerobic or facultative bacilli called Corynebacterium minutissimum. These lesions do not invade surrounding tissues and the systemic symptoms rarely occur.Smears of the throat swab should be stained with both In addition, Loeffler’s medium, containing serum and eggs, stimulates the growth of API Coryne strip and RapID CB Plus are commercial products available for the rapid identification of Treatment is achieved by suppression of bacterial growth by administration of penicillin and erythromycin antibiotics that eliminates One attack of diphtheria provides lifelong immunity.Active immunization is achieved by the administration of diphtheria toxoid: formaldehyde inactivated diphtheria toxin. [ June 18, 2020 ] Its most common association with human disease is the superficial skin infection erythrasma, which typically presents as reddish-brown macular patches involving the intertriginous areas. Interdigital foot infections are mostly caused initially by dermatophytes, yeasts and less frequently by bacteria. Interface dermatitis and scattered epithelioid granulomas may be seen. I am working as Microbiologist in National Public Health Laboratory (NPHL), government national reference laboratory under the Department of health services (DoHS), Nepal. [ March 20, 2020 ] If not treated early, the extension of pseudomembrane may lead to laryngeal obstruction, asphyxia, and death. [ April 4, 2020 ] Rapid detection of SARS-CoV-2 and diagnosis of COVID-19 [ July 2, 2020 ]
1. The treatment of choice is erythromycin 250 mg four times daily for 2 weeks. They help in the survival of the organisms during adverse environmental conditions; they do not have a Gram-positive bacteria retain the color of the primary stain (crystal violet) in the Gram staining procedure and appear as purple/violet under a light microscope. These toxins are responsible for Bacterial spores are highly resistant, dormant structures (i.e. On biopsy, condyloma lata show epidermal hyperplasia and lymphoplasmacytic infiltration of dermal vessels with endothelial hyperplasia, dilatation of the vascular lumens, and thickening of their walls. It is often administered in combination with tetanus, and pertussis vaccine.Passive immunization is considered as an emergency measure when susceptible person is exposed to infections and in such case 500-100units of antitoxin is administered subcutaneously after skin test (Schick test)Filtration Sterilization: Types, Mechanism and UsesFluorescence Microscope: Principle, Types and ApplicationsClostridium perfringens is a Gram-positive, anaerobic, spore-forming rod. Copyright © 2020 | MH Magazine WordPress Theme by Formation of the thick, gray, adherent pseudomembrane over the tonsils and throat is the most prominent specific sign. Describe the general characteristics of the Corynebacterium spp., including Gram stain morphology, culture media, and colonial appearance.. 2. For severe cases, a combination of oral erythromycin and topical antibiotics may be needed. The A or active subunit possesses the toxic activity, and the B or binding subunit is responsible or binding the exotoxin to specific receptors. All the samples obtained from the 121 patients with interdigital foot infections were examined directly with the use of 20% potassium hydroxide mounts and Gram stain under the microscope and cultured on Sabouraud’s dextrose agar plates. Topical clindamycin twice daily also can be used.Erythrasma can be confirmed with Wood lamp examination. The toxin binds to the cell surface via its binding subunit (B), and the active subunit (A) enters the cell. Skin scrapings can be stained with periodic acid–Schiff, methenamine silver, or Gram stain to assess for coccobacilli. Final results of culture testing confirmed C. minutissimum. Objectives. The specimen was cultured on 5% sheep blood agar plates at 35℃ overnight and identified using the Vitek II Anaerobic and Corynebacterium identification card (BioMérieux, Durham, NC, USA).
Corynebacterium minutissimum is the causative agent of erythrasma.