Abstract：
:Hookworm infection is still prevalent in southern Thailand despite control measures. Hookworm eggs submerged for an extended period under water from rainfall or in latrines may not survive, but they may recover their ability to develop into infective larvae when exposed to atmospheric air. This study examined the survival of the hookworm eggs in stool suspension and the restoration of development capability after prolonged storage. In stool mass, eggs developed normally and yielded infective filariform larvae (FL) in 7 days. On the contrary, in 1:10 stool suspension, hookworm eggs were found to remain at the 4-8 cell stage; degenerated eggs were observed after 15 days of storage, and the number of degenerated eggs reached 80 % on day 30. Aeration of the suspension, or transferring to a Petri dish or agar plate, restored the capacity of eggs stored for up to 15 days to develop into FL; thereafter, the capacity declined sharply. Retardation of egg development under water or in stool suspension may be due to a lack of atmospheric air. Use of "night soil" from latrines as fertilizer may be one factor in maintaining hookworm transmission, as worm eggs can undergo normal development upon exposure to atmospheric air.
journal_name
Parasitol Resjournal_title
Parasitology researchauthors
Na-Ek P,Sanpool O,Jongthawin J,Anamnart W,Intapan PM,Chamavit P,Maleewong Wdoi
10.1007/s00436-016-5031-4subject
Has Abstractpub_date
2016-07-01 00:00:00pages
2817-23issue
7eissn
0932-0113issn
1432-1955pii
10.1007/s00436-016-5031-4journal_volume
115pub_type
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