The life history strategy of a fur seal hookworm in relation to pathogenicity and host health status

Mauricio Seguel, Francisco Muñoz, Diego Perez-Venegas, Ananda Müller, Hector Paves, Elizabeth Howerth, Nicole Gottdenker

Resultado de la investigación: Article

3 Citas (Scopus)

Resumen

The strategies that parasites use to exploit their hosts can lead to adverse effects on human and animal populations. Here, we describe the life cycle, epidemiology, and consequences of hookworm (Uncinaria sp.) disease in South American fur seals (Arctocephalus australis), and propose that hookworm adaptation to fur seal life history traits has led to maximizing transmission at high levels of parasite-induced anemia and mortality. Fur seal pups acquire hookworms during their first days of life through their mothers’ colostrum and most adult hookworms are expelled from the pups’ intestine 30–65 days later. This gives hookworms little time to feed and reproduce. However, despite reaching high within-host densities, female hookworms do not decrease egg output, therefore pups with high hookworm burden contribute disproportionately to parasite egg shedding. These heavily infected pups also suffer severe anemia and high levels of hookworm-induced mortality. Alternative strategies to maximize total egg shedding and/or transmission, such as increased environmental survival of larval stages or avoidance of clearance, have not been developed by this hookworm. We propose that fur seal hookworms exploit a live fast-die young life history strategy, which translates to the highest levels of host anemia and mortality recorded among hookworms.

Idioma originalEnglish
Páginas (desde-hasta)251-260
Número de páginas10
PublicaciónInternational Journal for Parasitology: Parasites and Wildlife
Volumen7
N.º3
DOI
EstadoPublished - 1 dic 2018

Huella dactilar

Fur Seals
Ancylostomatoidea
hookworms
health status
seals
fur
Health Status
Virulence
pathogenicity
life history
pups
anemia
Ovum
Anemia
Parasites
parasites
Mortality
Uncinaria
Life History Traits
Colostrum

ASJC Scopus subject areas

  • Parasitology
  • Animal Science and Zoology
  • Infectious Diseases

Citar esto

Seguel, Mauricio ; Muñoz, Francisco ; Perez-Venegas, Diego ; Müller, Ananda ; Paves, Hector ; Howerth, Elizabeth ; Gottdenker, Nicole. / The life history strategy of a fur seal hookworm in relation to pathogenicity and host health status. En: International Journal for Parasitology: Parasites and Wildlife. 2018 ; Vol. 7, N.º 3. pp. 251-260.
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abstract = "The strategies that parasites use to exploit their hosts can lead to adverse effects on human and animal populations. Here, we describe the life cycle, epidemiology, and consequences of hookworm (Uncinaria sp.) disease in South American fur seals (Arctocephalus australis), and propose that hookworm adaptation to fur seal life history traits has led to maximizing transmission at high levels of parasite-induced anemia and mortality. Fur seal pups acquire hookworms during their first days of life through their mothers’ colostrum and most adult hookworms are expelled from the pups’ intestine 30–65 days later. This gives hookworms little time to feed and reproduce. However, despite reaching high within-host densities, female hookworms do not decrease egg output, therefore pups with high hookworm burden contribute disproportionately to parasite egg shedding. These heavily infected pups also suffer severe anemia and high levels of hookworm-induced mortality. Alternative strategies to maximize total egg shedding and/or transmission, such as increased environmental survival of larval stages or avoidance of clearance, have not been developed by this hookworm. We propose that fur seal hookworms exploit a live fast-die young life history strategy, which translates to the highest levels of host anemia and mortality recorded among hookworms.",
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The life history strategy of a fur seal hookworm in relation to pathogenicity and host health status. / Seguel, Mauricio; Muñoz, Francisco; Perez-Venegas, Diego; Müller, Ananda; Paves, Hector; Howerth, Elizabeth; Gottdenker, Nicole.

En: International Journal for Parasitology: Parasites and Wildlife, Vol. 7, N.º 3, 01.12.2018, p. 251-260.

Resultado de la investigación: Article

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T1 - The life history strategy of a fur seal hookworm in relation to pathogenicity and host health status

AU - Seguel, Mauricio

AU - Muñoz, Francisco

AU - Perez-Venegas, Diego

AU - Müller, Ananda

AU - Paves, Hector

AU - Howerth, Elizabeth

AU - Gottdenker, Nicole

PY - 2018/12/1

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AB - The strategies that parasites use to exploit their hosts can lead to adverse effects on human and animal populations. Here, we describe the life cycle, epidemiology, and consequences of hookworm (Uncinaria sp.) disease in South American fur seals (Arctocephalus australis), and propose that hookworm adaptation to fur seal life history traits has led to maximizing transmission at high levels of parasite-induced anemia and mortality. Fur seal pups acquire hookworms during their first days of life through their mothers’ colostrum and most adult hookworms are expelled from the pups’ intestine 30–65 days later. This gives hookworms little time to feed and reproduce. However, despite reaching high within-host densities, female hookworms do not decrease egg output, therefore pups with high hookworm burden contribute disproportionately to parasite egg shedding. These heavily infected pups also suffer severe anemia and high levels of hookworm-induced mortality. Alternative strategies to maximize total egg shedding and/or transmission, such as increased environmental survival of larval stages or avoidance of clearance, have not been developed by this hookworm. We propose that fur seal hookworms exploit a live fast-die young life history strategy, which translates to the highest levels of host anemia and mortality recorded among hookworms.

KW - Anemia

KW - Fur seals

KW - Hookworm

KW - Marine mammals

KW - Mortality

KW - Parasites

KW - Transmission-virulence trade off hypothesis

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