In a study of chronic lead intoxication in mature chickens, blood lead levels were significantly lower in hens than in roosters receiving the same oral dose of lead. It was then shown that eggshells from lead-treated hens contained 6-12 times the lead concentration of eggshells from control hens. Similarly, the lead content of egg yolks from treated hens was significantly higher than yolks from controls. Lead-treated hens laid significantly more eggs during the period of observation of nearly 3 years because of the increased frequency of laying cycles, which was almost three times that of control hens. A further observation was histologic damage to the mature testes of the rooster.
The results of evaluation of the autonomic nervous system of a patient with amyotrophic lateral sclerosis are presented. As previously reported, parasympathetic function and sympathetic adrenergic function were normal as assessed by cardiovascular reflexes. However, a disturbance in sympathetic cholinergic function as measured by the sympathetic skin response was demonstrated. We suggest that the latter test be included in all electrophysiological evaluations of autonomic function in amyotrophic lateral sclerosis.
Mycoplasma pneumoniae infection has been associated with a variety of neurologic complications involving the central nervous system, the peripheral nervous system and muscle. We present a patient who developed a previously unreported complication: mononeuritis multiplex. This consisted of a severe brachial plexus neuropathy with contralateral cervical monoradiculopathy.
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