The Sultanate of Oman, situated in the southeastern part of the
Arabian Peninsula, is characterized by a generally hot and dry climate
with its southern part affected by the summer monsoon. The spectrum
of infectious and tropical diseases in Oman is wide, however, incidence
and prevalence rates are usually low (Scrimgeour et al., 1999). A National
Malaria Eradication Program was established from 1976 to 1992 in
Oman and all malaria areas in the country were exposed to an intensive
eradication treatment. As a result, the number of malaria cases decreased
substantially from 14,827 in 1992 to 882 in 1998 (Scrimgeour et al.,
1999). However, even malaria-free regions still have the potential for
malaria introduction, as was demonstrated in 1998 by a malaria outbreak