Effects of Plasmodium yoelii nigeriensis infection on Anopheles stephensi egg development and resorption

被引:24
作者
Carwardine, SL [1 ]
Hurd, H [1 ]
机构
[1] UNIV KEELE,DEPT BIOL SCI,CTR APPL ENTOMOL & PARASITOL,KEELE ST5 5BG,STAFFS,ENGLAND
关键词
Anopheles stephensi; Plasmodium yoelii nigeriensis; fecundity; resorption; egg development; malaria; vector;
D O I
10.1111/j.1365-2915.1997.tb00405.x
中图分类号
Q96 [昆虫学];
学科分类号
摘要
It has been shown previously that infection with Plasmodium yoelii nigeriensis reduces the number of eggs produced by female Anopheles stephensi. Here we examine the mechanism underlying fecundity reduction. Ovaries from infected and uninfected (control) female mosquitoes were examined 12, 24 or 36h after blood-feeding during the first gonotrophic cycle (replicated) or the second gonotrophic cycle (unreplicated). Follicular development was assessed according to Christophers' stages and the proportions of developing and resorbing follicles per ovary were determined. Resorption of some follicles commenced within 12 h of blood-feeding, affecting significantly more follicles in the infected females: 1.1% v. 3.2%. The difference was greatest 36h after blood-feeding: 25% reduction (10 v. 35%) in the first cycle; 16% reduction (9 v. 25%) in the second gonotrophic cycle. The mean speed of oogenesis was also found to be significantly retarded in infected mosquitoes. During the second gonotrophic cycle, for example, only 92-94% of follicles reached stage III by 24h and stage IV by 36h in infected females, whereas all the developing follicles of uninfected females reached these stages more or less synchronously in the time specified.
引用
收藏
页码:265 / 269
页数:5
相关论文
共 11 条
[1]  
Christophers S. R., 1911, Paludism Simla, V2
[2]  
Clements A.N., 1992, BIOL MOSQUITOES, V1
[3]   OVARIAN DEVELOPMENT IN MOSQUITOS - STAGES OF GROWTH AND ARREST, AND FOLLICULAR RESORPTION [J].
CLEMENTS, AN ;
BOOCOCK, MR .
PHYSIOLOGICAL ENTOMOLOGY, 1984, 9 (01) :1-8
[4]   EFFECT OF HOST INFECTION WITH PLASMODIUM-GALLINACEUM ON REPRODUCTIVE CAPACITY OF AEDES-AEGYPTI [J].
FREIER, JE ;
FRIEDMAN, S .
JOURNAL OF INVERTEBRATE PATHOLOGY, 1976, 28 (02) :161-166
[6]   Comparative fecundity and associated factors for two sibling species of the Anopheles gambiae complex occurring sympatrically in The Gambia [J].
Hogg, JC ;
Thomson, MC ;
Hurd, H .
MEDICAL AND VETERINARY ENTOMOLOGY, 1996, 10 (04) :385-391
[7]   MALARIA-INDUCED REDUCTION OF FECUNDITY DURING THE FIRST GONOTROPHIC CYCLE OF ANOPHELES-STEPHENSI MOSQUITOS [J].
HOGG, JC ;
HURD, H .
MEDICAL AND VETERINARY ENTOMOLOGY, 1995, 9 (02) :176-180
[8]   Plasmodium yoelii nigeriensis: The effect of high and low intensity of infection upon the egg production and bloodmeal size of Anopheles stephensi during three gonotrophic cycles [J].
Hogg, JC ;
Hurd, H .
PARASITOLOGY, 1995, 111 :555-562
[9]   INTERACTIONS BETWEEN BLOODFEEDING, FECUNDITY AND INFECTION IN MOSQUITOS [J].
HURD, H ;
HOGG, JC ;
RENSHAW, M .
PARASITOLOGY TODAY, 1995, 11 (11) :411-416
[10]  
Hurd H, 1997, PARASITES PATHOGENS