The number of suspected and confirmed swine flu cases climbed worldwide Tuesday as health officials work against the flu believed to be spreading from Mexico.

Classes have been canceled in schools around Mexico City. Health authorities, trying to protect the country's residents and visitors, have discouraged large-group gatherings, even restricting restaurants to take-out only, CNN reported.

At least 112 cases have been confirmed worldwide, including the 64 U.S. cases, health agencies reported. Six confirmed cases were reported in Canada, 11 in New Zealand, two in both Spain and the United Kingdom, and one in Israel.

The majority of the U.S. confirmed cases are from a school in New York City. In addition to the confirmed cases, CNN reported several states -- such as Indiana and North Carolina -- reported possible swine flu cases.

In Florida, an Adventist Health System official said a case of swine flu was confirmed in Orlando, WFTV reported.

"A case was diagnosed here in Orlando today on a tourist from Mexico who came to Disney attractions two days ago to visit," the system's chief medical officer Loran Hauck wrote in an e-mail obtained by the Orlando television station.

Countries in North and South America, Europe, Asia and elsewhere have indicated they have stepped up scrutiny at ports of entry of travelers from Mexico, the United States and Canada.

The Centers for Disease Control in Atlanta said it expects to see more cases reported in the near term. Acting Director Dr. Richard Besser said the incubation is typically two-to-seven days, and the median age of the patients confirmed of having swine flu is 16.

Besser noted 3,600 deaths occur during a typical flu season, adding, "influenza is a severe infection."

周二，世界范围被证实的猪流感病例和疑似病例又上升了。相关的卫生工作人员认为，这种流感病毒是从墨西哥流传开来的。

墨西哥城的学校已经停课了。据CNN报道，为了保障国民和游客安全，卫生部门已经禁止大规模集会，甚至连饭店都只能卖外卖了。

卫生部门报道，现在世界范围内已有112起病例被证实，其中美国64起，加拿大6起，新西兰11起，西班牙和英国各2起，以色列有1起。

美国的患者主要在纽约城的一家学校。根据CNN的报道，除了已被证实的病例外，在其他州，比如印第安纳和北卡罗来纳州，都有疑似病例的报道。

WFTV电视台报道说，弗罗里达的台安卫生系统工作人员证实，在奥兰多已经有一起猪流感病例发生。

奥兰多电视台收到一封来自卫生系统首席医官罗兰霍克的邮件，里面写到：“今天，奥兰多确诊了一名患者。他是来自墨西哥的游客，两天前到迪士尼胜地游玩的。”

南北美洲的国家，欧洲国家，亚洲国家及其他地方都声明已经加强对来自墨西哥，美国和加拿大游客的检查了。

亚特兰大的疾病防控中心称，近期会有更多的病例发生。执行总监理查德贝瑟博士说，这种病的潜伏期一般为2到7天，患者的平均年龄为16岁。

在典型的流感季节，贝瑟已经见证了3600起死亡病例，他说流感是很可怕的传染病。