Lenton, who won five gold medals at this year’s world swimming championships in Melbourne, clocked a time of 53.58 seconds in the women’s 100-metre freestyle to finish ahead of compatriot Cate Campbell, who clocked 54.70.
China’s Zhu Yingwen was third in 54.89.
In the men’s 100-metre freestyle, Lauterstein posted a time of 49.38 to edge compatriot Matthew Targett by .09 seconds.
American Nick Brunelli finished third with a time of 49.54.
Australian swimmers also posted victories in the men’s and women’s 4x200-metre freestyle relays.
In other races, Athens Olympic gold medalist Otylia Jedrzejczak overtook Australian world champion Jessicah Schipper over the final 50 metres to win the women’s 200 butterfly with a time of 2:06.15.
It was Jedrzejczak’s second medal of the meet, adding to the silver she won in the 400 freestyle on Tuesday.
Kirsty Coventry of Zimbabwe took top honours in the women’s 100-metre backstroke with a time of 59.85, ahead of Japan’s Reiko Nakamura, who touched the wall in 1:00.58.
Riaan Schoeman of South Africa breezed to victory in the men’s 400-metre individual medley with a time of 4:15.41, almost two seconds ahead of runner-up Pawel Korzeniowski of Poland.
Results:
Men’s:
100m freestyle: 1. Andrew Lauterstein (AUS) 49.38; 2. Matthew Targett (AUS) 49.47; 3. Nick Brunelli (USA) 49.54; 4. Chen Zuo (CHN) 49.69; 5. Hisayoshi Sato (JPN) 49.81.
100m backstroke: 1. Liam Tancock (ENG) 53.46; 2. Randall Bal (USA) 53.91; 3. Tomomi Morita (JPN) 54.13; 4. David Cromwell (USA) 54.20; 5. Ashley Delaney (AUS) 54.55.
400m individual medley: 1. Riaan Schoeman (RSA) 4:15.41; 2. Pawel Korzeniowski (POL) 4:17.06; 3. Takahiro Mori (JPN) 4:18.65; 4. Mateusz Matczak (POL) 4:19.29; 5. Clark Burckle (USA) 4:19.39.
4x200m freestyle relay: 1. Australia 7:10.90 (Kenrick Monk, Andrew Mewing, Patrick Murphy, Grant Hackett); 2. Japan 7:14.98; 3. China 7:16.16; 4. USA 7:23.50; 5. Poland 7:28.54.
Women’s:
100m freestyle: 1. Lisbeth Lenton (AUS) 53.58; 2. Cate Campbell (AUS) 54.70; 3. Zhu Yingwen (CHN) 54.89; 4. Xu Yanwei (CHN) 54.90; 4= Josefin Lillhage (SWE) 54.90.
100m backstroke: 1. Kirsty Coventry (ZIM) 59.85; 2. Reiko Nakamura (JPN) 1:00.58; 3. Emily Seebohm (AUS) 1:00.66; 4. Hanae Ito (JPN) 1:00.97; 5. Hayley McGregory (USA) 1:01.24.
200m butterfly: 1. Otylia Jedrzejczak (POL) 2:06.15; 2. Jessicah Schipper (AUS) 2:06.68; 3. Audrey Lacroix (CAN) 2:06.93; 4. Jiao Liuyang (CHN) 2:07.06; 5. Yuko Nakanishi (JPN) 2:07.65.
4x200m freestyle relay: 1. Australia 7:57.03 (Bronte Barratt, Stephanie Rice, Shayne Reese, Linda Mackenzie); 2. Britain 7:58.64; 3. China 7:59.64; 4. USA 8:00.32; 5. Japan 8:06.89.—Agencies
Medal standings after two days at the International swimming meet:
Gold Silver Bronze Total
Australia 8 6 1 15
Poland 2 2 2 6
Zimbabwe 2 0 0 2
Japan 1 4 2 7
Britain 1 1 1 3
South Korea 1 0 0 1
South Africa 1 0 0 1
USA 0 2 4 6
China 0 1 5 6
Canada 0 0 1 1
Total 16 16 16 48