title: [Comparative biology and feeding behavior of Rhodnius neglectus and Rhodnius robustus (Triatominae) under laboratory conditions].
abstract: BACKGROUND
  The vector competence of triatomine insects is determined by studying their biology and feeding behavior under field and/or laboratory conditions. Factors including the number of bites, the amount of blood ingested and defecation time have implications for trypanosome transmission. The biological and behavioral parameters of Rhodnius neglectus and R. robustus were compared under experimental conditions to estimate differences in the potential transmission of trypanosomes.
  
  
  METHODS
  The insects were observed daily to determine the period of nymphal development, mortality, detection of food source, number of bites, time of blood meal intake, amount of blood ingested, time elapsed between the end of the meal and the first defecation and the frequency of defecation.
  
  
  RESULTS
  Although the nymphal development of R. neglectus (156.4 ± 25.05d) was lower than that of R. robustus (204.7 ± 13.22d), the mortality between species was similar (63.8 and 65% respectively).R. robustus and R. neglectus quickly located the food source, especially in the first instar (2.5 and 1.6 min, respectively). Although the time of blood meal intake was similar between the species, R. robustus ingested a larger amount of blood on average at all stages and exhibited higher values for the fifth instar. Nymphs of R. neglectus bit more frequently, and they defecated faster and more often than those of R. robustus.
  
  
  CONCLUSIONS
  Under laboratory conditions, R. neglectus has a greater potential for transmission of Trypanosoma cruzi and T. rangeli than does R. robustus, an attribute that should be further evaluated in experimental infections.
authors.affiliation: Laboratório de Parasitologia Médica e Biologia de Vetores, Faculdade de Medicina, Universidade de Brasília, Brasília, DF. daniellabaag@hotmail.com
authors.forename: Daniella
authors.initials: D
authors.lastname: Barreto-Santana
authors.forename: Jacqueline
authors.initials: J
authors.lastname: Starling
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Gurgel-Gonçalves
authors.forename: César Augusto Cuba
authors.initials: CA
authors.lastname: Cuba
mesh_terms: D000818:Animals; D003672:Defecation / Q000502:physiology*; D005247:Feeding Behavior / Q000502:physiology*; D007303:Insect Vectors / Q000145:classification / Q000254:growth & development / Q000502:physiology*; D007753:Laboratories; D008018:Life Cycle Stages; D012239:Rhodnius / Q000145:classification / Q000254:growth & development / Q000502:physiology*