منابع مشابه
Stress and sex in malaria parasites
For vector-borne parasites such as malaria, how within- and between-host processes interact to shape transmission is poorly understood. In the host, malaria parasites replicate asexually but for transmission to occur, specialized sexual stages (gametocytes) must be produced. Despite the central role that gametocytes play in disease transmission, explanations of why parasites adjust gametocyte p...
متن کاملSex, parasites and resistance--an evolutionary approach.
Immune systems are among the most diverse biological systems. An evolutionary arms race between hosts and rapidly evolving pathogens is supposed to be a reason for this diversity, and might explain why most eukaryotic hosts and parasites reproduce sexually. In this review, I will focus on possible benefits of sexual reproduction in hosts and parasites, using a model system consisting of a tapew...
متن کاملThe maintenance of sex in parasites.
The maintenance of sex is an unresolved paradox in evolutionary biology, given the inherent twofold fitness advantage for asexuals. Parasitic helminths offer a unique opportunity to address this enigma. Parasites that can create novel antigenic strains are able to escape pre-existing host immunity. Viruses produce diversity through mutation with rapid clonal proliferation. The long generation t...
متن کاملSex: How Malaria Parasites Get Turned On
The mechanisms underlying sexual stage switching in Plasmodium spp. have hitherto remained a mystery. However, two recent studies have revealed that an apicomplexan-specific DNA-binding protein is essential for the initiation of this cell fate decision, ultimately providing the malaria community with a novel and important tool in the battle to prevent malaria transmission.
متن کاملGardening and the Feeble-Minded
as the outdoor activities of mental defectives in institutions had previously been limited to elementary jobs, such as sweeping the paths, and generally acting as labourers to the staff engaged on the ornamental gardens. It was recognised that, for many years, patients in large mental institutions and colonies had been employed on farms, pig feeding, etc.; some of them had been taught to milk c...
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ژورنال
عنوان ژورنال: TheScienceBreaker
سال: 2019
ISSN: 2571-9262
DOI: 10.25250/thescbr.brk130