Rubber plantation practices during the
night are related to malaria risks in MRPs that are likely due
to occupational risk alone. For example, the rubber tappers
reduce their night-time sleeping hours and are housed in
low-lying homes that do not increase risk of infection;
however, they usually practice rubber tapping and rubber
sheet processing during the night at smallholdings in
malaria transmission foci. It is possible that most rubber
tappers and accompanying persons or schoolchildren who
work at night in smaller polygonal rubber plantations may
have a lower chance of malaria vector exposure. It is
unlikely that these susceptible persons who have more work
hours at night in the polygonal rubber plantations have
increased malaria risks as a result of anything other than
work exposures.