Australian lower-order batter Ashleigh Gardner faces a delayed start to the Women's World Cup after testing positive to COVID-19 in New Zealand.

Big-hitting Australian all-rounder Ashleigh Garder will miss the start of the Women's World Cup after contracting COVID-19 in New Zealand.

Gardner is set to miss Australia's opening two matches, beginning with the tournament-opener against England on Saturday in Hamilton.

Cricket Australia (CA) says Gardner produced a positive rapid antigen test (RAT) result while in a training camp in the South Island.

The reigning Belinda Clark Medallist will now have to spend a 10-day stretch isolating in the garden city as the rest of the team travels north.

"Gardner will remain in Christchurch and in line with ICC and New Zealand Government Health guidelines will continue isolating for 10 days," the CA statement read.

"All remaining Australian players and support staff have tested negative following subsequent RATs, and will proceed with existing plans to travel to Hamilton."

Gardner played in a warm-up clash on Tuesday, thrashing 60 off 32 in the high-scoring loss to New Zealand.

She produced the positive RAT on Wednesday morning, receiving confirmation from a positive PCR result on Thursday morning.

A CA staff member will also stay in Christchurch to support Gardner.

Given government rules, she will also be sidelined for Australia's second match - against Pakistan on Tuesday in Mount Maunganui - before coming into contention for game three against New Zealand in Wellington on March 13.

A bigger concern might be whether the virus could spread to her teammates, even if they're yet to produce positive results.

Governing body ICC has introduced emergency rules for the tournament, allowing matches to go on with just nine players if necessary.

They have also declared their willingness to reschedule matches if required.

The Cricket World Cup is extremely unfortunately timed for New Zealand.

The country is now in the grip of its worst outbreak since the pandemic struck, with cases topping 23,000 on Thursday.

Teams are not confined to bubbles though precautionary measures have been taken by both the ICC and teams, including booking out whole floors of hotels, the use of charter planes and limited interaction with outside people.