According to both
the World Health Organization (WHO) and the USA's Center for Disease
Control (CDC), both say that Vientiane is the only area in Laos that
is considered a not-at-risk area.
WHO: "Malaria
risk predominantly due to P. falciparum exists throughout the year
in the whole country except in Vientiane. Chloroquine-resistant P.
falciparum reported.
Recommended prophylaxis: mefloquine."
CDC: "All[areas],
except no risk in city of Vientiane."
The most common
prophylaxis seems to be doxycycline, mefloquine and Malarone, among
a few others. Malarone (Atovaquone/proguanil) does not have a generic
equivalent yet and is therefore quite expensive ($250-400, at the
time of this writing). However some of the other forms of anti-malarial
drugs are said to be ineffective as apparently the virus has already
adapted in some areas. Doxycycline and mefloquine are still recommended
for Laos though according to most sources.
On the one hand
it's good to be cautious and prepared in the odd case that you do
get it while in Laos. On the other hand those who live in SE Asia
(and other malaria prone regions) often say that those coming from
the West are perhaps a tad paranoid on this issue.
In the end it
is best to be prepared and to complete some research of your own and
of course contact your physician. Carrying those extra anti-malaria
drugs never hurts, I'd say.
Here are some
helpful links:
http://www.cdc.gov/travel/regionalmalaria/seasia.htm
http://www.who.int/ith/chapter07_01.html