Host responses which control Trypanosoma brucei parasites
Two host responses control Trypanosoma brucei parasitaemia in mice: an immune system-independent process which regulates the rate of parasite multiplication, and an antibody response specific for external epitopes...on parasite-attached variable surface glycoprotein (VSG), which determines the rate of parasite destruction. Parasite multiplication appears to be stimulated by host-derived growth factors which have a molecular mass of 10<sup>5 to greater than 10<sup>6 daltons. These molecules are not lipoproteins or immunoglobulins and serve to maintain T. brucei parasites as dividing slender forms. When the molecules become limiting, the parasites differentiate to nondividing stumpy forms. Nondividing stumpy-form T. brucei parasites degenerate in their mammalian host, giving rise to fragments which stimulate antibody responses. In the absence of these immunostimulatory fragments, no antibody responses are induced, i.e. antibody responses in animals infected with the parasites is modified by an immunodepressive reaction. Immunodepression is associated with rapid disruption of splenic organization into red and white pulp areas, and the generation of plasma cells which have highly distended sacs of endoplasmic reticulum and do not secrete antibody. The information on which these conclusions are based is reviewed and the relevance of the studies to the Development of strategies for the control of African trypanosomes in their mammalian hosts is discussed. The information on which these conclusions are based is reviewed and the relevance of the studies to the Development of strategies for the control of African trypanosomes in their mammalian hosts is discussed.
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| Format: | Conference Paper biblioteca |
| Language: | English |
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Cambridge University Press
1986
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| Subjects: | host parasite relations, disease control, trypanosoma brucei, animal diseases, |
| Online Access: | https://hdl.handle.net/10568/50635 |
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dig-cgspace-10568-506352016-05-30T17:53:09Z Host responses which control Trypanosoma brucei parasites Black, S.J. host parasite relations disease control trypanosoma brucei animal diseases Two host responses control Trypanosoma brucei parasitaemia in mice: an immune system-independent process which regulates the rate of parasite multiplication, and an antibody response specific for external epitopes...on parasite-attached variable surface glycoprotein (VSG), which determines the rate of parasite destruction. Parasite multiplication appears to be stimulated by host-derived growth factors which have a molecular mass of 10<sup>5 to greater than 10<sup>6 daltons. These molecules are not lipoproteins or immunoglobulins and serve to maintain T. brucei parasites as dividing slender forms. When the molecules become limiting, the parasites differentiate to nondividing stumpy forms. Nondividing stumpy-form T. brucei parasites degenerate in their mammalian host, giving rise to fragments which stimulate antibody responses. In the absence of these immunostimulatory fragments, no antibody responses are induced, i.e. antibody responses in animals infected with the parasites is modified by an immunodepressive reaction. Immunodepression is associated with rapid disruption of splenic organization into red and white pulp areas, and the generation of plasma cells which have highly distended sacs of endoplasmic reticulum and do not secrete antibody. The information on which these conclusions are based is reviewed and the relevance of the studies to the Development of strategies for the control of African trypanosomes in their mammalian hosts is discussed. The information on which these conclusions are based is reviewed and the relevance of the studies to the Development of strategies for the control of African trypanosomes in their mammalian hosts is discussed. 1986 2014-10-31T06:21:27Z 2014-10-31T06:21:27Z Conference Paper https://hdl.handle.net/10568/50635 en Limited Access Cambridge University Press |
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| tag |
biblioteca |
| region |
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Biblioteca del CGIAR |
| language |
English |
| topic |
host parasite relations disease control trypanosoma brucei animal diseases host parasite relations disease control trypanosoma brucei animal diseases |
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host parasite relations disease control trypanosoma brucei animal diseases host parasite relations disease control trypanosoma brucei animal diseases Black, S.J. Host responses which control Trypanosoma brucei parasites |
| description |
Two host responses control Trypanosoma brucei parasitaemia in mice: an immune system-independent process which regulates the rate of parasite multiplication, and an antibody response specific for external epitopes...on parasite-attached variable surface glycoprotein (VSG), which determines the rate of parasite destruction. Parasite multiplication appears to be stimulated by host-derived growth factors which have a molecular mass of 10<sup>5 to greater than 10<sup>6 daltons. These molecules are not lipoproteins or immunoglobulins and serve to maintain T. brucei parasites as dividing slender forms. When the molecules become limiting, the parasites differentiate to nondividing stumpy forms. Nondividing stumpy-form T. brucei parasites degenerate in their mammalian host, giving rise to fragments which stimulate antibody responses. In the absence of these immunostimulatory fragments, no antibody responses are induced, i.e. antibody responses in animals infected with the parasites is modified by an immunodepressive reaction. Immunodepression is associated with rapid disruption of splenic organization into red and white pulp areas, and the generation of plasma cells which have highly distended sacs of endoplasmic reticulum and do not secrete antibody. The information on which these conclusions are based is reviewed and the relevance of the studies to the Development of strategies for the control of African trypanosomes in their mammalian hosts is discussed. The information on which these conclusions are based is reviewed and the relevance of the studies to the Development of strategies for the control of African trypanosomes in their mammalian hosts is discussed. |
| format |
Conference Paper |
| topic_facet |
host parasite relations disease control trypanosoma brucei animal diseases |
| author |
Black, S.J. |
| author_facet |
Black, S.J. |
| author_sort |
Black, S.J. |
| title |
Host responses which control Trypanosoma brucei parasites |
| title_short |
Host responses which control Trypanosoma brucei parasites |
| title_full |
Host responses which control Trypanosoma brucei parasites |
| title_fullStr |
Host responses which control Trypanosoma brucei parasites |
| title_full_unstemmed |
Host responses which control Trypanosoma brucei parasites |
| title_sort |
host responses which control trypanosoma brucei parasites |
| publisher |
Cambridge University Press |
| publishDate |
1986 |
| url |
https://hdl.handle.net/10568/50635 |
| work_keys_str_mv |
AT blacksj hostresponseswhichcontroltrypanosomabruceiparasites |
| _version_ |
1779050411215290368 |