The most common types of illnesses are caused by contaminated food and water. In New Zealand that really shouldn’t be an issue. New Zealand has high hygiene standards and strict health regulations when it comes to serving food and beverage from shops, restaurants, cafés, and bars. The tap water is fine to drink. Locals do it all the time.
National Centers for Disease Control and Prevention (800/232–4636 international travelers' health line. www.cdc.gov.)
World Health Organization (www.who.int.)
General health standards in New Zealand are high, and it would be hard to find a more pristine natural environment.
The major health hazard in New Zealand is sunburn or sunstroke. Even people who are not normally bothered by strong sun should cover up with a long-sleeve shirt, a hat, and pants or a beach wrap. At higher altitudes you will burn more easily, so apply sunscreen liberally before you go out—even for a half hour—and wear a visor or sunglasses.
Dehydration is another serious danger that can be easily avoided, so be sure to carry water and drink often. Limit the amount of time you spend in the sun for the first few days until you are acclimatized, and avoid sunbathing in the middle of the day.
There are no venomous snakes, and the only native poisonous spider, the katipo, is a rarity. The whitetail spider, an unwelcome and accidental import from Australia, packs a nasty bite and can cause discomfort but is also rarely encountered.
One New Zealander you will come to loathe is the tiny black sand fly (some call it the state bird), common to the western half of the South Island, which inflicts a painful bite that can itch for several days. In other parts of the country, especially around rivers and lakes, you may be pestered by mosquitoes. Be sure to use insect repellent.
One of New Zealand's rare health hazards involves its pristine-looking bodies of water; as a precaution don't drink water from natural outdoor sources. Although the country's alpine lakes might look like backdrops for mineral-water ads, some in the South Island harbor a tiny organism that can cause "duck itch," a temporary but intense skin irritation. The organism is found only on the shallow lake margins, so the chances of infection are greatly reduced if you stick to deeper water. Streams can be infected by giardia, a waterborne protozoal parasite that can cause gastrointestinal disorders, including acute diarrhea. Giardia is most likely contracted when drinking from streams that pass through an area inhabited by mammals (such as cattle or possums). There is no risk of infection if you drink from streams above the tree line.
Less common, but a risk nevertheless, is the possibility of contracting amoebic meningitis from the water in geothermal pools. The illness is caused by an organism that can enter the body when the water is forced up the nose. The organism is quite rare, but you should avoid putting your head underwater in thermal pools or jumping in them. Also remember not to drink geothermic water.
Popular headache, pain, and flu medicines are Nurofen (contains Ibuprofen), Panadol (contains Paracetamol), and Dispirin (contains Aspirin). Dispirin often comes as large tabs, which you must dissolve in water. Many Kiwi households and wheelhouses have a green tube of Berocca, the soluble vitamin supplement often taken the morning after a big night out.