Good Morning Rubytour,
I think you may come into contact with monkeys but it is not guaranteed however we always advise you to speak with your GP about vaccinations before coming on tour.
With regards to the teabags etc., I contacted our agents and they advised:
Please note that clients can carry these items in their check-in baggage provided properly packed and if Indian custom ask then they have to declare however all these items should be in limit for individual use and not in bulk. Further we request you to reconfirm with your International carrier that they may have different security norms.
I hope this helps.
Kind Regards,
Mildred