Five pigmented isolates of Mycobacterium avium subsp. paratuberculosis were examined by pulsed-field gel electrophoresis (PFGE), IS900 restriction fragment length polymorphism (IS900-RFLP), and IS1311 polymorphism analysis using PCR. All of the pigmented isolates exhibited one of three distinct PFGE profiles with SnaBI, designated 9, 10, and 11, and with SpeI, designated 7, 8, and 9, which gene...

Cellular blue nevus is an uncommon pigmented tumor in the conjunctiva, where it generally appears as a deep, circumscribed, pigmented conjunctival mass. We report a case of conjunctival blue nevus that clinically resembled primary acquired melanosis and gave rise to conjunctival melanoma. A 41-year-old man developed a diffuse pigmented mass in the inferior fornix of his left eye. Over a 20-year...

Two out of 60 conjunctival epithelial tumours reviewed between 1973 and 1989 were found to be pigmented. One tumour was a pigmented papilloma and the other a pigmented squamous cell carcinoma. The melanin pigment was found in epithelial tumour cells as well as in macrophages, dendritic melanocytes, and Langerhans cells. The distinction between the latter two types of cells was possible in one o...

Langerhans' cells were observed to migrate into chemically injured corneal epithelium of pigmented and albino guinea pigs in substantial numbers. Whereas the migration of Langerhans' cells was a regular occurrence in both pigmented and nonpigmented animals, the migration of melanocytes occurred in only a portion of the pigmented animals and in fewer numbers. These observations may have signific...

Pigmented lesions are commonly found in the mouth. Such lesions represent a variety of clinical entities, ranging from physiologic changes to manifestations of systemic illnesses and malignant neoplasms. Evaluation of a patient presenting with a pigmented lesion should include a full medical and dental history, extraoral and intraoral examinations and, in some cases, biopsy and laboratory inves...

Pigmented Bowen's disease is rare, though more prevalent in men. It presents as a well-delineated plaque in areas unexposed to sun. There are reports of association with seborrheic keratosis, solar lentigo or exuberant pigmentation of genital and intertriginous regions. A specific dermoscopy finding is the presence of brown or gray dots in regular arrangement and coiled or dotted vessels. Thus,...

The incidence of malignant melanoma is increasing every year. Revealing melanoma in situ on time is increasing good prognosis of these patients. To evaluate the role of digital epiluminescence microscopy (DELM) in the differential diagnosis of cutaneous pigmented lesions and to improve the early diagnosis of melanoma in situ, 8384 pigmented lesions from 3927 consecutive patients were evaluated ...

Biofilters are key components in recirculating aquaculture systems (RAS). For ensuring cost-efficient function of biofilters, characteristics biocarriers such as shape, material, surface area, density, longevity, and price needs to be evaluated. In this study, we compared otherwise identical made polyethylene (PE) against ones polypropylene (PP) PP with three different levels pigment (carbon bl...