The thickness of eosinophilic band in collagenous colitis (CC) was assessed by 3 methods: histologic estimates (22 observers), conventional measurements using a calibrated micrometric scale (1 observer), and semiautomatic micrometric measurements (1 observer). By the histologic estimate technique, 7.4% of the results failed to diagnose CC; by calibrated micrometry, the failure was 6% and by sem...

A nondescript dog aged six months was presented with a history of alopecia, severe itching, thickening skin on ears, around eyes, forehead and lateral aspects abdomen. Clinical examination revealed dermatitis, irregular lesions, crust formation, erythema, pruritis alopecia the affected area. Upon microscopic analysis scrapings, it found that there were abundant short tailed Demodex cornei mites...

An auxanometer based on capacitance micrometry is described. It does not require light or contact with the plant, and will detect changes in length of the Avena coleoptile of 1 micrometer in 3 to 5 seconds. The field employed, 1 kilohertz at a gradient of 5 volts per centimeter, does not affect the growth rate of the coleoptile. Vertical illumination with blue light at fluences of 1 to 50 ergs....

Parasitic diseases reflect the health and balance of ecosystems, affecting not only individuals but also entire populations or communities. The aim of this study was to report on the diversity of parasitic helminths detected in the feces of a wild feline in southern Brazil. Parasites were obtained from fecal samples, and four techniques were used for parasitological examination: direct examinat...