Digestión fatal

    Anochece en la sabana africana. Se oye el feroz rugido de un león. Acaba de despertarse de su siesta después de haber comido medio antílope. Y tiene dolor de estómago. Maldita úlcera, le está agriando el carácter (antes no rugía tanto)... Pobre león. ¡Qué culpa tendrá él de que sus ancestros se comieran a ese estúpido mono que andaba a dos patas con un palo en la mano!

    Para aquél que no domine el idioma de la pérfida albión, lo resumiré: unos científicos han demostrado que la especie de bacteria que provoca úlceras en los grandes félidos ha evolucionado a partir de una cepa de la bacteria que provoca úlceras en humanos. Es decir, un león se comió un humano y no sólo le sentó mal, sino que le pegó una desagradable enfermedad. Como dice Carl Zimmer, la avenida del parasitismo es de doble sentido.

Referencias (TrackBacks)

URL de trackback de esta historia http://evolucionarios.blogalia.com//trackbacks/41000


De: Txema M Fecha: 2006-06-20 19:39

¿Está Helicobacter presente en gorilas y chimpancés? ¿Está emparentada con otras bacterias detectadas en otros monos?

De: Evolutionibus Fecha: 2006-06-20 22:40

Justamente viene hoy en prensa este artículo
Me quedo con el párrafo que dice que la evolución del genoma de la bacteria ha ido a la par que la del ser humano.

De: QQ Fecha: 2006-06-21 01:34

¡Que se joda! ¡Maldito león asesino de humanos! ¡Toma bacteria, mamón!

De: BioMaxi Fecha: 2006-06-21 01:39

Txema, hay Helicobacter en otros mamíferos, por ejemplo roedores, pero no sé si la pylori esté en chimps o se trate de otra especie. Es que estas cosas son muy complicadas con bacterias...

De: Yo Fecha: 2006-06-22 13:20

Aqui os envio una noticia que viene en Nature (441, 8 de junio, 2006: 683-685) cuyo titulo y encabezamiento os copio a continuación:


Viruses are often thought of as simple Creatures. But their staggering diversity and genetic promiscuity could make them the most creative force in evolution, says Garry Hamilton."

Ya que estamos hablando de bacterias, tan importantes en la evolución, creo que es hora de que vayamos haciendo espacio a los virus como actores principales en la evolución ...

De: Amalio Fecha: 2006-06-22 13:35

Otra forma más de ir puteando a las especies, poniéndonos como comida.

De: Anónimo Fecha: 2006-06-22 15:48

Tanto da cuantos Natures o Sciences salgan publicados sobre virus y evolucion. En Espanya, mientras Sandin no desaparezca, nunca seran considerados.

De: yo Fecha: 2006-07-05 17:49

¿asi funcionan las cosas? conocido anonimo, creo percibir cierta animadversión personal en tu insignificante diatriba, ignorando por completo el contenido del comentario al que me refiero. Menos mal que la aceptación de nuevas evidencias basadas en sólidos trabajos científicos solo depende en parte de mentes tan rácanas como anónimas ...

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