Document baw3jYw8xL46ZzDVapQ58B2ao

Industrial Hygiene Dlgeet February, 1956 204 Urinary Lasd Excretion following Treatment with Sodium Calcium Ethylaaa^amiwetetraacctate. M. Sslvini and U. Vtdall. Folia Mad. 38, 579-592 (1955). Italian. '' '"~* In persona arttlx land poisoning and traatad with, disodium calcium. EDTA. (ree laad appoara immediataly altar cessation o{ treatmant whlla the cxcratlon of tha laad che- lata contlnnaa (or aoma days. Tha excretion o( laad chalata lasts in ?* and in tha rabbit Inagar than tha axcration ot calcium chalata. .. Abata. 205 Manganese. Occ. Health Ball. (Haw Jersey State Dept. Health. Bor. o( Adult aad Occ. Health). 4. No."5 PP. (1955). * Tha naaa aad compoucda of maagaaaaa are brially discussed. Manganese poison ing ia comparatively rare, but serious aad even fatal poisonings have occurred, mostly from Inhalation or swallowing oC tha dust or (tunes o( its compounds. Symptoms of poisoning usually are not present until niter three months* exposure to heavy couceutratloas. Symptoms are described, mostly Involving the nervous system. The incidence of pneumonia has been re ported to be high in manganese workers. A medical control program is described. Direc tions are given Cor the determination o( manganese in air. Seven suggestions axe given (or prophylaxis, including removal o( the dust, approved respirators only when other measures are impractical, periodic testing o( the sir, and sanitary measures. The official threshold limit Is 6 mg. per cu. m. Cor eight hours' daily exposure. 206 gthyloncdlsmiaotetraacettc Arid in Manganese Poisoning of Rate. A Pr*n"*<"TT Study. Mary F. Kossi and A. J. Boyle, fail. Med. ItSurg. 25, 1-3 (Jan. 1956 J. An experimental cage arrangement hue been divined which satisfactorily elimin ates contamination of urine by food nod feces (or manganese poisoning studies. Calcium EDTA when injected subcutaneously in rats given manganese previously increases markedly the manganese content of urine, but does aot extract manganese from the Intestinal contents. Manganese EDTA complex may be injected subcutaneously in rata without producing skin lesions. Approximately of the manganese in the above form ts excreted in the urine within 24 hours following subcutaneous injection. Evidence tends to show that subcutane ously injected calcium EDTA lowers the concentration of manganese ia the liver aad brain tisanes of rats poisoned with this metal. Some evidence ia presented which indicates that manganese is redistributed ia liver end bone following cessation of subcutaneous calcium EDTA injection. -- Cood. from authors' summary 207 Industrial Thallium Poisoning. J. Glornms sad B. Sjostrom. Svenska JLakaxtidn. 52. 1436-1441 (June 3, 1955). Swedish with English summary. Four cnees of occupational thallium poisoning were investigated. The patients were engaged in the manufacture of rodeaticldee at four different workshops. Thallium sulfate wee used In the dry state mad in solution. The patients had been careless ia hand ling tha powder and did not suspect poisoning. Sensory changes in the distal parts of tha Umba were accompanied by only minor aad uncertain signs of polyneuritis. In only one case was alopecia definitely demonstrable. One patient's symptoms had varlsd from to time with the degree of exposure to thallium over a period of four years. It should be comparatively easy to prevent thallium poisoning by taking simple precautions in handling. In Sweden thallium-containing rodentleides are made in small factories, and as the symptoms are general and non-specific, history tslrlng by the physician will be helpful. -- Coed, from Bull. Hyg. 208 Study of the Health of Workers Employed in Mining and Processing of Vanadium Ore. F. J. Viatinner and others. Ardx. lad. Health 12, ^35 -641 (Dec. 1955). Environmental aad medical studies wars made of 78 workers engaged in the process ing of vanadium-bearing ore sad 37 workers who were employed by the same company in occu,, patioaa where there was no exposure to vanadium from the various processing operations. Of the 78 workers exposed to vanadium, 39 workers were exposed to dust from the ore before roasting (inactive ore) In concentrations ranging from 0. 004 to 2. lib mg. of vanadium per cubic meter of sir, sad 39 workers were exposed to vanadium after roasting (active ore) and .> -M 90R 1371