Blue Bell delivery trucks are parked at the creamery's location in Kansas City, Kan., days after people were sickened after eating tainted ice cream. The company has received a financial lifeline months after halting its sales. (Orlin Wagner/AP)

For more than a century, Blue Bell ice cream has played off its roots as a favorite southern treat from tiny Brenham, Tex., to quietly become one of the nation's biggest brands — the third-largest ice cream maker last year.

Last year, it sold 6.4 percent of America's ice cream. Now, it accounts for none.

The company hasn't sold a scoop since April, when it halted production after Listeria-tainted ice cream sickened people in four states.

But months after the outbreak put the company in dire straits, it may have been tossed a lifeline by one of Texas's most prominent businessmen. Earlier this week, the company announced a "significant investment" from billionaire Sid Bass, and the company says it may soon be able to start making test batches of ice cream again.

Company spokeswoman Jenny Van Dorf wouldn't disclose the terms of the deal with Bass, but in May, Blue Bell chief executive Paul Kruse asked the company's small circle of investors for a shot in the arm, the Wall Street Journal reported. In a letter, Kruse said it needed up to $125 million to overcome "a financial crisis that could force us to close the company."

Blue Bell, which is privately owned, has been forced to lay off 1,450 employees, more than a third of its workforce, and furloughed 1,400 others since the Listeria outbreak. Analysts estimate the shutdown has cost the company more than $200 million.

“We are pleased Sid Bass has made a significant investment with our company,” Blue Bell chief executive Paul Kruse said in a statement. “The additional capital will ensure the successful return of our ice cream to the market and our loyal customers.”

Bass couldn’t be reached for comment. In a statement from the company, he said, “Blue Bell is the quality leader in the ice cream industry. We believe quality is the principle attribute that ensures the success, growth and longevity of a business."

Blue Bell wouldn't say if Bass has invested in the company before, but he comes from a family famous in Texas for its wealth. Forbes estimates Bass is worth $1.7 billion, a fortune he accumulated by investing an oil inheritance he shared with three brothers.

The company's troubles come as ice cream sales across the U.S. have flattened out in recent years, appearing to plateau in 2012, according to Euromonitor. Sales are expected to stay mostly flat through at least 2019 as consumers continue to eye healthier treats, analysts say.

Blue Bell had bucked that trend, growing into one of America's largest ice cream brands. Founded in 1907, Blue Bell is sold in just 23 states, mostly in the Southeast, but managed to double its market share over the past decade, according to the market research firm Euromonitor.

It moved into new markets, rolled out new flavors in recent years, helping it keep its loyal fan base, said Beth Bloom, a food and drink analyst at Mintel, a market research firm. "They were definitely on a tear — a positive tear," she said.

Its revenue reached $680 million last year, according to PrivCo, which estimates the financials of privately owned companies. This year with the recall weighing it down, Blue Bell's revenue is expected to fall to $550 million, PrivCo said.

It was the first time in its 108 years that Blue Bell had issued a recall, and it was expansive: 8 million gallons in all were thrown out. (Listeria causes nausea, fever and diarrhea and can be more serious, even fatal, for people with weak immune systems.)

Blue Bell is in the midst of a months-long process to find the source of the Listeria and stop its spread. The company has said it is taking apart its machines to clean them, sanitizing air conditioning systems and re-training employees, among other changes.

On Twitter last week, the company said it planned to begin test production at one of its smaller factories in "several weeks." Van Dorf said a date isn't set for testing to start.

It was welcome news for the company's loyal following, who have asked for weeks when they might see tubs of Blue Bell ice cream in grocery stores again in streams of tweets dotted with crying emojis and the company's telling Twitter handle, @ILoveBlueBell.

Rep. Joe Barton, who represents a slice of Texas more than a hundred miles from Brenham, last week excitedly tweeted a news story about the coming tests, saying, "There is nothing better on a hot #Texas summer day than @ILoveBlueBell! Can't wait for it to come back!"

Others spoke of the company as though scoops of homemade vanilla and buttered pecan were lovers who got away. "I miss you," one fan tweeted, as another held out hope for the ice cream like a forlorn lover: "If it's over, just say so, and I'll move on. I'll be OK, really."