JEFFERSON CITY, Mo. — A St. Joseph doctor wore a face mask on the Missouri House floor Thursday to illustrate a point about swine flu that didn’t sit well with all lawmakers.

Missouri health officials discovered the first probable case of the virus Wednesday in a specimen from a Platte County resident. A second suspected case was disclosed Thursday for a 19-year-old Missouri resident who was getting treatment in Nebraska.

“Sometimes the best way to draw attention to a very serious issue is to use a little bit of levity,” Rep. Dr. Rob Schaaf, a Republican, told representatives while donning a mask that covered his nose and mouth during a point of personal privilege. The House procedure allows members to speak on topics of their choice, regardless of the current debate.

Dr. Schaaf urged lawmakers to practice “cough etiquette” to prevent the spread of the virus.

“It’s so simple, if you’re going to sneeze, cover your mouth and use a tissue,” he said.

Someone shouted for Dr. Schaaf to sit down after he recommended that large groups of school children avoid the Capitol in the next two weeks.

House Speaker Ron Richard, R-Joplin, then interrupted Dr. Schaaf.

“Are we about finished with all the — I’ve had about all the points of privilege I can take today,” Mr. Richard said. “I’ll just remind the body, do what your mother said. Wash your hands and use a handkerchief or Kleenex and let’s move on.”

Rep. Jason Brown, a Platte City Republican, said in an interview he found the use of the mask offensive, given that someone in his legislative district more than likely has contracted the virus. Platte County officials said in a press conference Thursday that the suspected case involved a resident from the northern part of the county.

State and local health officials have not released additional details, including the age and city of residence, for the two Missouri individuals believed to have the swine flu.

“I just thought that was completely insensitive. ... Obviously it’s a very serious issue,” Mr. Brown said. “It’s ridiculous behavior to suggest and try to create hysteria and confusion. Quite frankly, it’s inappropriate.”

Both Dr. Schaaf and Mr. Brown are mulling bids for the 34th Senatorial District that Sen. Charlie Shields, R-St. Joseph, will vacate at the end of 2010.

Alyson E. Raletz can be reached

at alysonraletz@npgco.com.