Hepatic iron overload in birds: Analytical and morphological studies

Hepatic iron content was determined in post mortem specimens from a wide range of avian species collected over a 12-month period. The majority (> 90%) of these specimens (n = 40) showed high iron content (up to 12 mg Fe/g tissue). The highest concentrations were associated with fibrosis and regenerative nodules. Dietary analysis indicated that the iron intake was not excessive, suggesting that iron-loading was due to enhanced intestinal absorption.     

Flow cytometric leucocyte counts

A flow cytometric method was evaluated for performing total leucocyte counts on bovine blood. Fifty blood samples from 19 healthy Holstein cows were analysed on a flow cytometer. The method involved diluting blood with either hypotonic or isotonic saline solution, lysing the red blood cells, and performing a 2-parameter analysis on the basis of cell size and cellular granularity. Leucocyte numbers were determined by creating a window on dot plots of cell size (determined by forward light scatter) vs cellular granularity (determined by the logarithm of side light scatter). Total leucocyte counts determined by flow, cytometer with either diluent were lower (p<0.01) than counts determined by use of an electronic particle counter. The correlations between electronic particle counts and flow cytometric counts using isotonic or hypotonic diluents were 0.857 and 0.458, respectively. The determination of total leucocyte counts using flow cytometry of a blood sample diluted in isotonic saline and treated to lyse red blood cells shows potential as a way for counting leucocytes.     

Phagocytosis and killing of staphylococci by human polymorphonuclear and mononuclear leucocytes.

The phagocytosis and killing of 3H-thymidine-labelled Staphylococcus aureus by polymorphonuclear leucocytes (PMNs) and monocytes (MNs) obtained from 50 health donors were evaluated. In addition, extracellular factors that might influence phagocytosis and killing were studied. The method described gave highly reproducible results. No significant difference was observed in the phagocytic and killing functions of a single donor's PMNs and MNs when studied several times in one day and longitudinally over a period of 1-12 weeks for six donors tested. Likewise, no signigicant difference in uptake and killing was observed when bacteria were opsonised with sera from 11 different normal donors. When Staph. aureus opsonised with normal serum was added to the leucocytes in a ratio of 10 bacteria: 1 leucocyte, the uptake by PMNs and MNs from 50 donors after 20 minutes' incubation was 85% +/- 7 standard deviation (SD) (range 75-98%) and 69% +/- 11 SD (range 54-90%), respectively. The rate of uptake by MNs in the first three minutes of the assay period was only 60% of that by PMNs.     

Montgomery's areolar tubercle. A light microscopic study

Conflicting impressions regarding the anatomy of Montgomery's areolar tubercle exist. Twelve modified radical mastectomy specimens provided 1,536 serial sections of areolar tubercles. In 34 of 35 tubercles (97%), a mammary lactiferous duct was associated with a sebaceous apparatus. This lactiferous duct ascended from deeper mammary parenchyma and entered the sebaceous gland. Histopathologic changes identified included featured of fibrocystic disease, atypical intraductal hyperplasia, and carcinoma in situ. Because the areolar tubercle has two components, a sebaceous gland and a mammary duct arising from deeper breast parenchyma, diseases of the breast may also involve the areola independent of papilla-nipple involvement. Areolar preservation may best be used with the knowledge that diseases underlying the areola may also involve the areola.     

Diogenes syndrome

Endogenous or physically conditioned psychoses are usually considered to be the underlying cause of signs of extreme self-neglect and social retreat if these occur suddenly in persons who had been socially successful up to that time. However, in recent years several independent researchers have found extreme sociocultural refusal attitudes even in patients not displaying any psychotic disturbances. This unexpected result led to a new syndrome concept which has since been accepted internationally under the designation "Diogenes syndrome". Hence, the Diogenes syndrome comprises shameless neglect of body and personal environment, associated with collectionism, social retreat and rejection of any well-meant help. It has been reported that this constellation of signs allegedly occurs with enhanced frequency in women over 60 years of age with self-isolation tendencies in their previous life history. The following article reviews the literature published so far on the Diogenes syndrome and presents two cases treated by the authors, as a suitable means to re-examine and to define the new syndrome concept more precisely. The following conclusions can be drawn from the cases already reported in the literature and the two cases newly presented here: The socioculturally complete rejection associated with the Diogenes syndrome is the final result of a personality-based abnormal emotional reaction development. Marked seclusion tendencies in the previous life history, as well as organic brain diseases, are relevant. Medical treatment can be successful mainly by means of behaviour therapy techniques.     

The effects of UV-B irradiation on the corneal endothelium

Rabbit eyes, in vivo and in vitro, were exposed to UV-B irradiation at 300 nm, from a mercury arc lamp with an 11 nm bandpass filter. Radiant exposure ranged from 0.1 J/cm2 to 0.5 J/cm2. In vivo, swelling of the cornea resulted over a 12 to 40 hr period, the extent and duration being directly related to exposure. Recovery of normal thickness was complete within four days. Corneas removed at 18 hr after exposure recovered normal thickness during a five hour perfusion period, except for those most heavily exposed. When removed at 42 hr post exposure all corneas thinned to almost normal thickness. SEM showed the endothelial cells of exposed eyes to have either exaggerated villi on the surface and a disorganized mosaic or, after higher exposures, to be devoid of villi and have loose, flap like cell borders and large "blebs." After exposure of isolated corneas mounted for perfusion, swelling again ensued and similar changes were observed in the appearance of the cells, except that "blebs" were not found. No significant changes were observed in the metabolic components ATP, ascorbate and glutathione, nor was there any indication of lipid peroxidation. At higher in vivo exposures, the aqueous humor did show a decrease in ascorbate concentration and an increase in protein content, which probably result from a breakdown of the blood-aqueous barrier. UV-B irradiation may cause or promote changes in the endothelium associated with aging, but the one time radiant exposures of the magnitude used in this study, appear to have no severe or permanently toxic effects.     

Pneumomediastinum after self-dilation of the esophagus

Pneumomediastinum following esophageal perforation is a known complication of Eder Puestow dilation for esophageal stenosis. This is the first reported case of esophageal perforation and pneumomediastinum occurring after instrumental self-dilation of a stenotic esophageal lesion. The observed 0.02 percent perforation rate in this patient (compared to the reported 0.3 percent in Eder Puestow "hetero"-dilation) makes the Eder Puestow auto-dilation procedure seem justifiable in a well-trained and well-informed patient.