The exploration of the chiasm and retrochiasmal visual pathways relies on magnetic resonance imaging. If a lesion of the optic chiasm is suspected, the millimetric acquisitions in T2 and T1 weighting with and without contrast infusion are carried out in the three planes.
There are two vaccines available in the UK-an oral vaccine and an injectable vaccine. Both vaccines stimulate your body to make antibodies against typhoid germs (bacteria). These antibodies protect you from illness should you become infected with typhoid bacteria.
Live typhoid vaccine (oral). 1  Four doses: one capsule every other day for a week (day 1, day 3, day 5, and day 7). 2  The last dose should be given at least 1 week before travel to allow the vaccine time to work. 3  Swallow each dose about an hour before a meal with a cold or lukewarm drink.ive typhoid vaccine (oral). 1  Should not be given to children younger than 6 years of age. 2  Anyone who has had a severe reaction to a previous dose of this vaccine should not get another dose. 3  Anyone who has a severe allergy to any component of this vaccine should not get it.