Summary
Infection withPlasmodium berghei results in the disease of a relatively high percentage of mosquitoes depending on the experimental conditions. The damage caused by the parasites may be so severe that the host dies. It can also become manifest for instance in a change in the amino acid content of the mosquito homogenate. The amino acid content of mosquitoes fed on a glucose solution, normal mouse blood, or the blood of infected mice was analysed qualitatively and quantitatively over a period of 14 days. The amino acids lysine, phenylalanine, proline, threonine, and tyrosine are always found in higher concentrations in infected mosquitoes. The content of leucine (and/or isoleucine) increased from the 6th day and glutamic acid from the 9th day compared to the controls. Lower concentrations were found for alanine, aspartic acid, glycine, and serine as compared to uninfected mosquitoes. Further investigations on this subject might help to find the causes for the susceptibility or resistance of individual mosquitoes to plasmodia.
Zusammenfassung
Nach Infektion mitPlasmodium berghei erkrankt je nach Versuchsbedingungen ein mehr oder weniger großer Prozentsatz der Moskitos. Der schädliche Einfluß der Parasiten kann dabei so gravierend sein, daß der Wirt zugrunde geht. Er kann sich aber auch auf andere Weise manifestieren, zum Beispiel im veränderten Aminosäuregehalt des Homogenats der Mücken. Der Aminosäuregehalt von Mücken, die mit Glucose-Lösung, normalem Mäuseblut oder mit dem Blut infizierter Mäuse gefüttert worden waren, wurde 14 Tage lang qualitativ und quantitativ analysiert und verglichen. Die Aminosäuren Lysin, Phenylalanin, Prolin, Threonin und Tyrosin sind bei infizierten Moskitos stets in höherer Konzentration vorhanden. Der Gehalt an Leucin (und/oder Isoleucin) steigt vom 6. Tag an, der der Glutaminsäure vom 9. Tag im Gegensatz zu den Kontrolltieren an. Niedrigere Konzentrationen gegenüber den nicht infizierten Mücken finden sich bei Alanin, Asparaginsäure, Glycin und Serin. Weitere Untersuchungen auf diesem Gebiet sollen vor allem die Ursachen für die Empfänglichkeit oder Resistenz bestimmter Moskitos gegenüber Plasmodien finden helfen.
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This study was supported in part by World Health Organization, Geneva.
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Gad, A.M., Maier, W.A. & Piekarski, G. Pathology ofAnopheles stephensi after infection withPlasmodium berghei berghei . Z. Parasitenkd. 60, 263–276 (1979). https://doi.org/10.1007/BF00929173
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DOI: https://doi.org/10.1007/BF00929173