TY - JOUR
T1 - Behavioral parameters of six populations of Meccus phyllosomus longipennis (Heteroptera: Reduviidae) from areas with high and low prevalences of Trypanosoma cruzi human infection
AU - Martínez-Ibarra, José Alejandro
AU - Nogueda-Torres, Benjamín
AU - Montañez-Valdez, Oziel Dante
AU - Michel-Parra, J. Guadalupe
AU - Ambriz-Santos, Miguel Ángel
N1 - Publisher Copyright:
© 2020 Institute of Zoology, Chinese Academy of Sciences
PY - 2021/6
Y1 - 2021/6
N2 - Three behaviors of epidemiological importance, namely feeding latency, feeding duration and defecation latency, for six populations of Meccus phyllosomus longipennis (Usinger) from areas of central, western and north-central Mexico with high (HP) and low (LP) prevalence of Trypanosoma cruzi (Chagas) human infection were evaluated in this study. The median feeding latency (the time taken to begin feeding) was highly variable between instars. Within–instar comparisons showed that at least 65% of the LP populations (N3 to adult) started to feed significantly (P < 0.05) later than the HP population, with N1 showing no difference, and N2 from LP populations feeding sooner than those from HP populations. The six populations had similar median feeding durations within instars. A higher (P < 0.05) percentage of the instars from HP populations defecated faster than the respective instars from the three LP populations. Approximately 25% of the young nymphs (N1 to N3) and females in the HP populations defecated < 2 min postfeeding, compared with 4%–6% of the young nymphs and 1.3%–3% of females in the LP populations. Moreover, 17.7%–38.8% of the older nymphs (N4 to N5) in the HP populations and 6.8%–13.4% in the LP populations defecated during or immediately after feeding. Our results indicate that the HP populations have a greater potential than the LP populations to transmit T. cruzi infections, which may underlie the differences in the prevalence of T. cruzi infection in some areas where M. p. longipennis is currently distributed.
AB - Three behaviors of epidemiological importance, namely feeding latency, feeding duration and defecation latency, for six populations of Meccus phyllosomus longipennis (Usinger) from areas of central, western and north-central Mexico with high (HP) and low (LP) prevalence of Trypanosoma cruzi (Chagas) human infection were evaluated in this study. The median feeding latency (the time taken to begin feeding) was highly variable between instars. Within–instar comparisons showed that at least 65% of the LP populations (N3 to adult) started to feed significantly (P < 0.05) later than the HP population, with N1 showing no difference, and N2 from LP populations feeding sooner than those from HP populations. The six populations had similar median feeding durations within instars. A higher (P < 0.05) percentage of the instars from HP populations defecated faster than the respective instars from the three LP populations. Approximately 25% of the young nymphs (N1 to N3) and females in the HP populations defecated < 2 min postfeeding, compared with 4%–6% of the young nymphs and 1.3%–3% of females in the LP populations. Moreover, 17.7%–38.8% of the older nymphs (N4 to N5) in the HP populations and 6.8%–13.4% in the LP populations defecated during or immediately after feeding. Our results indicate that the HP populations have a greater potential than the LP populations to transmit T. cruzi infections, which may underlie the differences in the prevalence of T. cruzi infection in some areas where M. p. longipennis is currently distributed.
KW - Chagas disease
KW - Meccus phyllosomus longipennis populations
KW - Mexico
KW - Triatominae
KW - Trypanosoma cruzi
KW - vectorial capacity
UR - http://www.scopus.com/inward/record.url?scp=85087209583&partnerID=8YFLogxK
U2 - 10.1111/1744-7917.12818
DO - 10.1111/1744-7917.12818
M3 - Artículo
C2 - 32426905
AN - SCOPUS:85087209583
SN - 1672-9609
VL - 28
SP - 850
EP - 860
JO - Insect Science
JF - Insect Science
IS - 3
ER -