ABSTRACT
We report a rare case of periodontal myiasis by New World screwworm Cochliomyia hominivorax, an obligatory larval parasite, in a 66-year-old woman. The myiasis occurred in the anterior upper jaw associated with a pre-existent generalised periodontitis. About 40 larvae were removed from the lesion. One week later the periodontal tissues were healing normally and the patient was referred to a periodontist. As all of the larvae were in the last stage, they were probably deposited 5-7 days before.
Subject(s)
Myiasis/diagnosis , Periodontal Diseases/parasitology , Screw Worm Infection/diagnosis , Aged , Animals , Chronic Disease , Diptera , Female , Humans , Larva , Periodontitis/complicationsABSTRACT
To investigate the behavioral effects of different vehicles microinjected into the dorsal periaqueductal grey (DPAG) of male Wistar rats, weighing 200-250 g, tested in the elevated plus maze, animals were implanted with cannulas aimed at this structure. One week after surgery the animals received microinjections into the DPAG of 0.9% (w/v) saline, 10% (v/v) dimethyl sulfoxide (DMSO), 2% (v/v) Tween-80, 10% (v/v) propylene glycol, or synthetic cerebrospinal fluid (CSF). Ten min after the injection (0.5 microliters) the animals (N = 8-13/group) were submitted to the elevated plus maze test. DMSO significantly increased the number of entries into both the open and enclosed arms when compared to 0.9% saline (2.7 +/- 0.8 and 8.7 +/- 1.3 vs 0.8 +/- 0.3 and 5.1 +/- 0.9, respectively. Duncan test, P < 0.05), and tended to increase enclosed arm entries as compared to 2% Tween-80 (8.7 +/- 1.3 vs 5.7 +/- 0.9, Duncan test, P < 0.10). In a second experiment no difference in plus maze exploration was found between 0.9% saline-or sham-injected animals (N = 11-13/group). These results indicate that intra-DPAG injection of some commonly used vehicles such as DMSO, saline or Tween-80 affects the exploratory activity of rats exposed to the elevated plus maze in statistically different manners.
