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Biomedical subjects

T C Beard

Publications and source records attributed to T C Beard.

At least 55 records · Page 3Linked to original sources
PubMed1980

SI units and sodium.

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Diet, Sodium-Restricted↗
PubMed1978

Evidence that a hydatid cyst is seldom "as old as the patient".

Human hydatid disease caused by the strain of Echinococcus granulosus endemic in Australia and New Zeland has been regarded as a very lonstanding condition, and most cysts diagnosed in adults were believed to have resulted from infection in childhood. A significant drop in the number of new cases among people and 25 and over (P less than 0.05) in two hydatid-control programmes makes it necessary to revise this view. In both Tasmania (P greater than 0.50) and New Zealand (0.50 greater than P greater than 0.10) the incidence was halved without significantly altering the age-distribution. These findings indicate that adults are relatively susceptible and that the latent period between infection and diagnosis in many cases is only a few years.

Adolescent↗
PubMed1977

Hospital records of hydatid disease in Victoria for 1970 to 1974.

The records of hydatid disease in 10 Melbourne hospitals and 12 rural hospitals in Victoria from 1970 to 1974 have been studied. In a total of 183 in-patients, the final diagnosis of hydatid disease had been confirmed surgically in 81 first admissions and in 56 readmissions. In 24 cases it was confirmed by necropsy, but in only one of these was hydatid disease believed to have been the cause of death. Figures are given for the age distribution and the organs involved.

Adolescent↗
PubMed1977

The control of hydatid disease and ovine cysticercoses in the Australian Capital Territory and southern New South Wales.

A survey of human hydatid disease in New South Wales and the Australian Capital Territory over the period 1968 to 1973 was made from hospital records in Sydney and Canberra. The 162 new cases found represent an incidence, of 0-57 per 100,000 per annum, but the 20 patients living in the Central West Statistical Division of New South Wales at the time of admission to hospital represent an incidence of 12-6 per 100,000 per annum in that area. A survey of A.C.T. farms revealed dogs carrying the causative parasite Echinococcus granulosus on five out of 44 properties (11-4%). Community attitudes favoured control measures but displayed a misplaced faith in anthelmintic drugs. The high regional prevalence on the Australian mainland reveals a need to restrict availability of anthelmintics and extend the vigorous control measures employed successfully in Tasmania.

Adolescent↗
PubMed1976

Mebendazole.

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Animals↗
PubMed1973

The elimination of echinococcosis from Iceland.

A century ago Iceland had the highest prevalence of human hydatid disease ever recorded anywhere. Since 1864 the disease has been gradually controlled, and today there is less than one new case per decade. The sheep population of about one million, over 95% of which is subject to inspection at slaughter, has yielded only 15 infected animals in the last 20 years. In most districts farm slaughtering still persists, though on a very limited scale, and farm dogs are subjected to very little control. The main credit for the remarkable control of E. granulosus is given to education, but many accidental social and environmental factors, peculiar to Iceland, contributed to the result. Of these, the most notable were the small human population and high rate of literacy; the very high dog mortality from distemper in the 19th century, which coincided with a major export trade in live sheep; the custom of feeding dogs on cooked household scraps, the risk of infection being confined to the short sheep slaughtering season and the rare occasions when a cow or pig is slaughtered; the absence of employed labour on Icelandic farms, all slaughtering being done by the owner, an educated man with middle-class values; the change in animal husbandry since 1920 towards the slaughter of 5-month-old lambs, too young to have viable cysts; and the meat subsidy, which since 1947 has led to the use of abattoirs for all but a handful of uneconomic animals kept for slaughter on the farm.

Animals↗
PubMedDate not supplied

Improved arterial distensibility in normotensive subjects on a low salt diet.

Arterial pulse wave velocity (PWV), a noninvasive index of arterial distensibility, was measured in 57 normotensive subjects who followed a voluntary low salt diet for a period ranging from 8 months to 5 years (mean, 24.8 months). Subjects who followed a regular diet were matched for age and mean arterial pressure with the low salt (LS) sample and were used as controls (C). For both samples, subjects were divided into three age groups: Group 1 (aged 2 to 19 years, n = 16), Group 2 (29 to 44 years, n = 26), and Group 3 (45 to 66 years, n = 15). There was a marked increase in aortic PWV with age in the control sample but not in the LS sample. There was no significant difference in aortic PWV for Group 1, but in Groups 2 and 3, the LS subjects showed a decrease of 21.8% and 22.7%, respectively, compared to C subjects. Aortic PWV (cm/sec) was: Group 1: C = 581 (SE44), LS = 614 (SE31); Group 2: C = 942 (SE46); LS = 737 (SE27) (p less than 0.001); Group 3: C = 958 (SE77), LS = 741 (SE25) (p less than 0.05]. Arm and leg PWV were also significantly lower in the older age groups. These findings suggest that normotensive adult subjects who follow a low salt diet (mean intake, 44 mmol Na/24 hours) have reduced arterial stiffness and that the effect is independent of blood pressure. This is prima facie evidence that reduced salt intake has a beneficial effect in improving distensibility of the central aorta and large peripheral arteries, which is independent of its antihypertensive action.

Adolescent↗