Cortisone and Infection

Cavallero, C; Sala, Giovanni

doi:10.1016/s0140-6736(51)91255-x

Cited by 21 publications

(2 citation statements)

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“…Evidence has been produced to show that other kinds of stress such as crowding, heat, cold, electrical stimuli, loud noises and fighting to establish social rank result in increased susceptibility and lowered acquired resistance to various parasites (Davis & Clark Read, 1958;Robinson, 1961;Noble, 1961Noble, , 1962Noble, , 1966. This lends support to Clark Read's hypothesis, as does the fact that the injection of cortisone, and to a lesser extent that of corticotrophin (ACTH), also increases susceptibility and reduces acquired resistance of hosts to a wide range of parasites (Cavallero & Sala, 1951 ;Stoner & Godwin, 1953;Weinstein, 1955;Coker, 1956c;Nelson, 1962). In many cases the effect of cortisone was sufficient to render species or strains of host, that were normally resistant, susceptible to a parasite (Ritterson, 1959;Briggs, 1959;Bezubik, 1960;Cross, 1960;Parker, 1961;Oliver, 1962).…”

Section: Introductionmentioning

confidence: 89%

Effect of Deficient Diets on Corticosteroid Synthesis by Rat Adrenals in Vitro and Its Relationship to Infections With Nippostrongylus Brasiliensis

Clarke¹

1969

Journal of Endocrinology

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Rats were fed on a low protein (LP) and a glucose\p=m-\filter paper (GFP) diet; they were then infected with 1000 larvae of the nematode worm Nippostrongylus brasiliensis (Travassos, 1914) and killed 5 or 10 days later.The adrenals of male and female rats on the GFP diet for 21 days showed atrophy and so did those of female rats on the LP diet for 42 or 56 days. The adrenals of male rats on the LP diet for 21 days were hypertrophic.Referred to body weight, the adrenal weights of male rats on both diets were higher than those of the controls, the weights of the adrenals of female rats on the deficient diets were lower.Adrenal weight and adrenal weight as a percentage of body weight were shown to bear no relationship to corticosteroid production in vitro, since the capacity for corticosteroid synthesis in vitro was increased in rats on the GFP diet only.Significantly more parasites were found in the intestine after 5, but not after 10 days on both deficient diets suggesting that the deficient diets increased the susceptibility of the rats on initial contact with the parasite and before the development of acquired resistance. Later more parasites were lost by the rats on the deficient diets than from controls. These findings were not related to changes in the rate of corticosteroid synthesis.The effects of stress, and the administration of cortisone or corticotrophin on host\p=m-\parasite relationships is discussed in relation to the results of the present experiments. It is concluded that though these factors can increase susceptibility and lower acquired resistance, the effect on susceptibility can also be produced independently by severe dietary deficiency.

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Section: Introductionmentioning

confidence: 89%

Effect of Deficient Diets on Corticosteroid Synthesis by Rat Adrenals in Vitro and Its Relationship to Infections With Nippostrongylus Brasiliensis

Clarke¹

1969

Journal of Endocrinology

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“…The natural tissue " defence barrier " thrown up against the invader in many cases reduces the possibility of such intimate contact, and if the administration of steroids can breach or destroy this barrier the previously inaccessible focus may now become exposed to the force of the more specific measures, or to the immunity mechanisms already developed by the body. Experimental evidence for such an action of steroids is provided by the work of Cavallero and Sala (1951). They found that in rats deliberately infected with coccidiosis, circumscribed granulomatous tuberculoid lesions developed, but if cortisone was administered at the same time a disseminated infection occurred, involving the spleen and lungs with strong inhibition of connective-tissue formation.…”

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confidence: 99%