I'd get as much info in advance from the visiting vet and see if they can bring shots etc for you. FWIW we had a cat (cassius ) in Fiji and he was not immunised and rarely wormed. He was awesome, and no, didnt spread disease to us. BUT and this is a big BUT...many many cats in these kinda conditions (ie developing tropical islands etc) do carry disease of some sort. these are not transmissable to humans and for the most part you wouldnt notice. but things like cat HIV and Influenza and Luekemia (which is a viral contagion in cats) is rampant. this does not pose any risk to you, but obviously can be bad for kitty OR mean that kitty if it has the disease wont be able to come home with you to Oz.

If you do get a kitten i would HIGHLY recommend trying to keep it indoors for as long as possible to get it strong as possible so that if it does come into contact with the other cats it has a better immunity to cope. also i dont know if it is like that in PNG, but we had alot of wild dogs and they unfortnatley LOVE a chase...i dont think i need to illustrate further, but you would want your cat to be fast and therefore a bit bigger and more savvy IYKWIM.

However, i would love to add that having Cassius was one of the BEST things that happened in our lives. he was just the most gorgeous precious little soul and really made the time we lived in Fiji. the times where it would get hard, lonely, frustrating it was a godsend when he would trot into the house and demand a cuddle.

and we did bring him back to Oz!

No milk!

they can eat all the meat that you guys get. just no dairy or onions. i would recommend cooking the meat as this will help with worms and/or poor meat handling issues (ie Fiji had alot of poor refrigeration due to generator failures etc). we also did some cooked rice etc for fibre. but again once they are outside they do tend to keep themselves quite well on that front. also whenever we went back to Oz we stocked up on cat biscuits, flea collars and worming tablets and flea treatments. we found that fleas were not a problem...too wet lol!