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- W2002325531 abstract "This paper examines those factors which determine the emergence of N. brasiliensis from the pulmonary circulation into the alveoli and bronchioles of the rat's lung. After injection into the superior vena cava, larvae were found to be distributed throughout the lobes of the lungs in direct relation to the mass of blood and tissue and it was concluded that this resulted from entirely random forces. Larvae which had been reversibly immobilized in piperazine were trapped in the capillaries of the lungs in the same way as untreated larvae; this accumulation was considered to be passive. Larvae could penetrate surgically collapsed lungs but did so in lower numbers than in functional lungs so host breathing movements may facilitate penetration but are not essential. Larvae could repeat their migrations in a succession of hosts, but only if removed from the lungs within 2 h, by 20 h they could not and were destroyed in the lung tissue. Larvae were passively trapped in the arterioles but can emerge only through their own behavioural efforts. Heavy larval doses (10,000) caused considerable reversible oedema and haemorrhage. This was due to the behaviour of the larvae and not the direct effect of mechanical blockage because the same was not true if 10,000 heat-killed larvae were injected. Larvae of Ancylostomatubae forme, which does not secrete enzymes, also caused haemorrhaging in rat lungs, demonstrating that larval motility alone can lead to emergence through rupturing arterioles. By 20 h larvae were active in the trachea but they showed no directional orientation and were carried passively in the mucus. At this stage they were strongly photonegative." @default.
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- W2002325531 date "1978-08-01" @default.
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- W2002325531 title "The location of parasites within their hosts: The passage of Nippostrongylus brasiliensis through the lungs of the laboratory rat" @default.
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- W2002325531 doi "https://doi.org/10.1016/0020-7519(78)90093-0" @default.
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