The exsheathment of Necator americanus infective larvae.
Infective 3rd-stage larvae of Necator americanus were treated with human sweat under various conditions, and compared with human serum, 1.5% saline solution, and distilled water. The infective larvae were observed under inverted microscopy. The highest percentage (14.0%) of the exsheathed larvae was found in human sweat after 2 hours' incubation at 37 degrees C. The proportion of exsheathed larvae in human sweat was significantly different from human serum (p<0.001), 1.5% saline solution (p<0.001), and distilled water (p<0.001). This may reflect the effect of human sweat on the process of skin penetration by Necator americanus larvae.
Pasuralertsakul
Sataporn
S
Department of Parasitology, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand. tmsps@mahidol.ac.th
Ngrenngarmlert
Warunee
W
D000818:Animals; D016009:Chi-Square Distribution; D006801:Humans; D007814:Larva / Q000472:pathogenicity* / Q000502:physiology; D017221:Necator americanus / Q000472:pathogenicity* / Q000502:physiology; D012867:Skin / Q000469:parasitology*; D013542:Sweat; D013696:Temperature