Hi,
Thanks for the query.

Typhoid is mainly caused by salmonella typhi.
It can spread by contaminated food and water etc.
The causes of recurrences are:
-Decreased immunity
-Infection with different strains other than previous one and the one which is present in vaccine.
Check if the cooks in the house are in the carrier state as they can spread the infection.
And also verify the hygiene of food and water sources.
While having infection weakness and loss of appetite are common.
Let him continue the medicines and he can take antacids before food that can help to some extent.
He can take liquid diet to start with that will help in decreasing the weakness and improving appetite.
And also plenty of water with electrolytes has to be taken.
Then he can start taking low quantity meals in more frequent intervals.
If having severe weakness, dehydration etc. intravenous fluids can help.

Hope I have answered your query. I will be available to answer your follow up queries. If you are satisfied with all my answer, please rate the answer after closing the discussion.
Take care.

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Hi,

Yes, as usually raw meat, fish etc. for non-vegetarian food will be brought form outside, that can be one source of infection.
The diet after typhoid should be easily digestible and well cooked.
It should include carbohydrates, proteins, milk and eggs etc.
For more details: WWW.WWWW.WW Usually booster dose of typhoid is needed after 5 years. As vaccine may not give complete protection, all necessary precautions should be taken to prevent the contamination of food.
Seasonal variation can be seen sometimes due to environmental causes.
Wish you Good Health, If you are satisfied with my response please rate the answer after closing the discussion.
Take care.

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