[Leish-l] Fwd: Re: sandfly, mosquito ..

volf at cesnet.cz volf at cesnet.cz
Tue Apr 7 05:12:17 BRT 2009


The sequence of forms described by Paul we saw in many parasite-vector
pairs. However, we try to be more precise as concerns the terminology of
forms.

Haptomonad is any form which is attached. Nectomonad is any form which is
freely moving in the midgut lumen. Therefore one word only is not
suitable do define the parasite stage. Good terminology of forms was
invented in 20th century already. Detailed description with all
measurements are given for example by Walters et al, 1989 and Walters
1993, and Cihakova and Volf, 1997.

Very long forms originating from procyclics should be called "Long
nectomonads". These occur in partially digested bloodmeal and escape to
ectoperitrophic space of the midgut. Next form prevailing in defecated
females is short and small. Paul Bates and Mattew Rogers gave them a name
"Leptomonad", however, it is a synonym of previously used "Short
promastigotes" or "Short nectomonads" by Walters (and us). Long or short
nectomonads can attach and become haptomonads.

In our terminology the sequence of nectomonad forms is:
Procyclics (oval, short flagellum, within the bloodmeal)
Long nectomonads (see above)
Short nectomonads (or leptomonads if you wish)
Metacyclics (highly motile, with long flagellum, different LPG etc)

Best wishes
Petr Volf


----- Forwarded message from jacobsr at cc.huji.ac.il -----
    Date: Mon, 06 Apr 2009 12:08:07 +0300
    From: Jake Jacobson <jacobsr at cc.huji.ac.il>
Reply-To: Jake Jacobson <jacobsr at cc.huji.ac.il>
 Subject: Re: [Leish-l] sandfly, mosquito ..
      To: leish-l at lineu.icb.usp.br

At 08:56 PM 04/04/09, you wrote:
>Let's talk about something else!
>Bob K-K

I agree - enough is enough already so soon.
Surely a suitable subject for discussion is the etymology of the
flagellated forms in the sand fly.
in the mid-20th Century we changed from Leishman-Donovan bodies to
amastigotes and leptomonads to promastigotes.
Now at the beginning of the 21st C we have:
"The developmental sequence of the five major promastigote forms:
procyclic promastigotes, nectomonad promastigotes, leptomonad
promastigotes, haptomonad promastigotes and metacyclic promastigotes.
The exact position of haptomonad promastigotes in the developmental
sequence is uncertain". Bates
PA
<http://www.sciencedirect.com//science/journal/00207519>International
Journal for
Parasitology
<http://www.sciencedirect.com//science?_ob=PublicationURL&_tockey=%23TOC%235057%232007%23999629989%23662628%23FLA%23&_cdi=5057&_pubType=J&view=c&_auth=y&_acct=C000032999&_version=1&_urlVersion=0&_userid=626711&md5=07330fba5b44fa1b4646d911b337b0f6>Volume
37, Issue 10, August 2007, Pages 1097-1106.
Does anyone know whether all these morphs occur in all species in
their phlebotomine hosts? And is monad the correct suffix for these forms?
Monad = unity and/or a flagellated protozoan (as of the genus Monas).
Jake Jacobson




Dr.R.L.Jacobson MPH PhD
Department of Parasitology
The Hebrew University-Hadassah Medical School
POB 12272, Jerusalem, 91120
Israel
Telephone 972-2-6758077
Fax          972-2-6757425
Mobile 054-4970731
NEW:
VOIP (from USA)  415-963-9801   (up to 17:00hrs EST)
No amount of experimentation can ever prove me right; a single
experiment can prove me wrong.
Albert E.



----- End forwarded message -----
-------------- next part --------------
At 08:56 PM 04/04/09, you wrote:
>Let's talk about something else!
>Bob K-K

I agree - enough is enough already so soon.
Surely a suitable subject for discussion is the etymology of the 
flagellated forms in the sand fly.
in the mid-20th Century we changed from Leishman-Donovan bodies to 
amastigotes and leptomonads to promastigotes.
Now at the beginning of the 21st C we have:
"The developmental sequence of the five major promastigote forms: 
procyclic promastigotes, nectomonad promastigotes, leptomonad 
promastigotes, haptomonad promastigotes and metacyclic promastigotes. 
The exact position of haptomonad promastigotes in the developmental 
sequence is uncertain". Bates 
PA 
<http://www.sciencedirect.com//science/journal/00207519>International 
Journal for 
Parasitology 
<http://www.sciencedirect.com//science?_ob=PublicationURL&_tockey=%23TOC%235057%232007%23999629989%23662628%23FLA%23&_cdi=5057&_pubType=J&view=c&_auth=y&_acct=C000032999&_version=1&_urlVersion=0&_userid=626711&md5=07330fba5b44fa1b4646d911b337b0f6>Volume 
37, Issue 10, August 2007, Pages 1097-1106.
Does anyone know whether all these morphs occur in all species in 
their phlebotomine hosts? And is monad the correct suffix for these forms?
Monad = unity and/or a flagellated protozoan (as of the genus Monas).
Jake Jacobson




Dr.R.L.Jacobson MPH PhD
Department of Parasitology
The Hebrew University-Hadassah Medical School
POB 12272, Jerusalem, 91120
Israel
Telephone 972-2-6758077
Fax          972-2-6757425
Mobile 054-4970731
NEW:
VOIP (from USA)  415-963-9801   (up to 17:00hrs EST)
No amount of experimentation can ever prove me right; a single 
experiment can prove me wrong.
Albert E.

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