Frequent Blood-Feeding and Restrictive Sugar-Feeding Behavior Enhance the Malaria Vector Potential of Anopheles gambiae s.l. and An. funestus (Diptera

Culicidae) in Western Kenya

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

Natural blood-feeding and sugar-feeding behaviors were investigated for populations of Anopheles gambiae s.l. and An. funestus Giles at 2 sites in western Kenya. During peak levels of malaria parasite transmission, >85% of 1,569 indoor-resting females contained fresh blood meals. Findings that up to 55.4% of blood-fed resting females and 72.0% of host-seeking females had either stage IV or V oocytes provided strong evidence that females were refeeding before oviposition. Such gonotrophic discordance was common throughout the year for both An. gambiae s.l. and An. funestus. Determinations of gonotrophic cycles for freshly blood-fed mosquitoes collected inside houses indicated that only 60.0% of 1,287 An. gambiae s.l. and 60.0% of 974 An. funestus oviposited eggs after a single blood meal. The timing of oviposition was irregular as indicated by relatively high coefficients of variation for An. gambiae s.l. (44.0%) and An. funestus (35.9%). Associated with frequent blood feeding was a surprisingly low rate of sugar feeding; only 6.3% of 1,183 indoor-resting and only 14.4% of 236 host-seeking anophelines were positive for fructose. Natural patterns of frequent blood feeding, year-round gonotrophic discordance, irregular oviposition cycles, and limited sugar feeding illustrate that anopheline mosquitoes have complex behavioral and physiologic means for adapting to their environment. In western Kenya, for example, adaptations for frequent blood feeding by An. gambiae s.l. and An. funestus potentiates their ability to transmit malaria parasites, well beyond that predicted by standard measures of vectorial capacity.

Original languageEnglish
Pages (from-to)613-618
Number of pages6
JournalJournal of Medical Entomology
Volume33
Issue number4
StatePublished - Jul 1 1996
Externally publishedYes

Fingerprint

sugar feeding
Anopheles gambiae
Kenya
Feeding Behavior
Culicidae
Diptera
malaria
Malaria
feeding behavior
blood
Oviposition
host seeking
oviposition
blood meal
Meals
vectorial capacity
gonotrophic cycle
Parasites
parasites
refeeding

Keywords

  • Anopheles funestus
  • Anopheles gambiae
  • Blood feeding
  • Malaria parasite transmission
  • Sugar feeding

ASJC Scopus subject areas

  • Insect Science
  • veterinary(all)

Cite this

@article{b969b1d50f8749b78c70b2a63f564dd8,
title = "Frequent Blood-Feeding and Restrictive Sugar-Feeding Behavior Enhance the Malaria Vector Potential of Anopheles gambiae s.l. and An. funestus (Diptera: Culicidae) in Western Kenya",
abstract = "Natural blood-feeding and sugar-feeding behaviors were investigated for populations of Anopheles gambiae s.l. and An. funestus Giles at 2 sites in western Kenya. During peak levels of malaria parasite transmission, >85{\%} of 1,569 indoor-resting females contained fresh blood meals. Findings that up to 55.4{\%} of blood-fed resting females and 72.0{\%} of host-seeking females had either stage IV or V oocytes provided strong evidence that females were refeeding before oviposition. Such gonotrophic discordance was common throughout the year for both An. gambiae s.l. and An. funestus. Determinations of gonotrophic cycles for freshly blood-fed mosquitoes collected inside houses indicated that only 60.0{\%} of 1,287 An. gambiae s.l. and 60.0{\%} of 974 An. funestus oviposited eggs after a single blood meal. The timing of oviposition was irregular as indicated by relatively high coefficients of variation for An. gambiae s.l. (44.0{\%}) and An. funestus (35.9{\%}). Associated with frequent blood feeding was a surprisingly low rate of sugar feeding; only 6.3{\%} of 1,183 indoor-resting and only 14.4{\%} of 236 host-seeking anophelines were positive for fructose. Natural patterns of frequent blood feeding, year-round gonotrophic discordance, irregular oviposition cycles, and limited sugar feeding illustrate that anopheline mosquitoes have complex behavioral and physiologic means for adapting to their environment. In western Kenya, for example, adaptations for frequent blood feeding by An. gambiae s.l. and An. funestus potentiates their ability to transmit malaria parasites, well beyond that predicted by standard measures of vectorial capacity.",
keywords = "Anopheles funestus, Anopheles gambiae, Blood feeding, Malaria parasite transmission, Sugar feeding",
author = "Beier, {John C}",
year = "1996",
month = "7",
day = "1",
language = "English",
volume = "33",
pages = "613--618",
journal = "Journal of Medical Entomology",
issn = "0022-2585",
publisher = "Entomological Society of America",
number = "4",

}

TY - JOUR

T1 - Frequent Blood-Feeding and Restrictive Sugar-Feeding Behavior Enhance the Malaria Vector Potential of Anopheles gambiae s.l. and An. funestus (Diptera

T2 - Culicidae) in Western Kenya

AU - Beier, John C

PY - 1996/7/1

Y1 - 1996/7/1

N2 - Natural blood-feeding and sugar-feeding behaviors were investigated for populations of Anopheles gambiae s.l. and An. funestus Giles at 2 sites in western Kenya. During peak levels of malaria parasite transmission, >85% of 1,569 indoor-resting females contained fresh blood meals. Findings that up to 55.4% of blood-fed resting females and 72.0% of host-seeking females had either stage IV or V oocytes provided strong evidence that females were refeeding before oviposition. Such gonotrophic discordance was common throughout the year for both An. gambiae s.l. and An. funestus. Determinations of gonotrophic cycles for freshly blood-fed mosquitoes collected inside houses indicated that only 60.0% of 1,287 An. gambiae s.l. and 60.0% of 974 An. funestus oviposited eggs after a single blood meal. The timing of oviposition was irregular as indicated by relatively high coefficients of variation for An. gambiae s.l. (44.0%) and An. funestus (35.9%). Associated with frequent blood feeding was a surprisingly low rate of sugar feeding; only 6.3% of 1,183 indoor-resting and only 14.4% of 236 host-seeking anophelines were positive for fructose. Natural patterns of frequent blood feeding, year-round gonotrophic discordance, irregular oviposition cycles, and limited sugar feeding illustrate that anopheline mosquitoes have complex behavioral and physiologic means for adapting to their environment. In western Kenya, for example, adaptations for frequent blood feeding by An. gambiae s.l. and An. funestus potentiates their ability to transmit malaria parasites, well beyond that predicted by standard measures of vectorial capacity.

AB - Natural blood-feeding and sugar-feeding behaviors were investigated for populations of Anopheles gambiae s.l. and An. funestus Giles at 2 sites in western Kenya. During peak levels of malaria parasite transmission, >85% of 1,569 indoor-resting females contained fresh blood meals. Findings that up to 55.4% of blood-fed resting females and 72.0% of host-seeking females had either stage IV or V oocytes provided strong evidence that females were refeeding before oviposition. Such gonotrophic discordance was common throughout the year for both An. gambiae s.l. and An. funestus. Determinations of gonotrophic cycles for freshly blood-fed mosquitoes collected inside houses indicated that only 60.0% of 1,287 An. gambiae s.l. and 60.0% of 974 An. funestus oviposited eggs after a single blood meal. The timing of oviposition was irregular as indicated by relatively high coefficients of variation for An. gambiae s.l. (44.0%) and An. funestus (35.9%). Associated with frequent blood feeding was a surprisingly low rate of sugar feeding; only 6.3% of 1,183 indoor-resting and only 14.4% of 236 host-seeking anophelines were positive for fructose. Natural patterns of frequent blood feeding, year-round gonotrophic discordance, irregular oviposition cycles, and limited sugar feeding illustrate that anopheline mosquitoes have complex behavioral and physiologic means for adapting to their environment. In western Kenya, for example, adaptations for frequent blood feeding by An. gambiae s.l. and An. funestus potentiates their ability to transmit malaria parasites, well beyond that predicted by standard measures of vectorial capacity.

KW - Anopheles funestus

KW - Anopheles gambiae

KW - Blood feeding

KW - Malaria parasite transmission

KW - Sugar feeding

UR - http://www.scopus.com/inward/record.url?scp=0030187285&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030187285&partnerID=8YFLogxK

M3 - Article

VL - 33

SP - 613

EP - 618

JO - Journal of Medical Entomology

JF - Journal of Medical Entomology

SN - 0022-2585

IS - 4

ER -