Kansas City, Mo. — It’s been nearly three years since the Detroit Lions lost consecutive regular-season games, a testament to the resiliency and mental fortitude head coach Dan Campbell has hammered into a roster that’s 39-11 over its last 50 contests.

That streak will soon be put to the test.

The Lions, following a 30-17 loss to the Kansas City Chiefs on Sunday, are hosting the Tampa Bay Buccaneers for “Monday Night Football” in Week 7. The Buccaneers, sitting atop the NFC after six weeks, are winners of two straight. They own a 5-1 record, tied with the Indianapolis Colts for the NFL’s best.

If you believe what the Lions say, and if you believe in what they’ve accomplished over the last 36 months, don’t expect Sunday’s result at Arrowhead Stadium to linger into next week’s matchup with the Bucs.

“I mean, we’re men. We’re going to show up to work, we’re going to collect the film and we’re going to get back to work,” defensive tackle DJ Reader said. “I don’t think anybody on this team’s going to hang their head. I mean, s—, we’re 4-2. The sky’s not falling out of the air. … You’re 4-2, you’re still at the top of your conference. You just lost a game to a good team.”

Reader described Detroit’s loss to Kansas City as “frustrating,” and he rejected a notion that the Lions weren’t as focused as they typically are.

“We just got beat today, that’s just what it came down to. We didn’t respond well to all the adversity that was out there,” Reader said.

The Lions struggled in the biggest moments Sunday. The Chiefs converted two of their three fourth-down attempts. The Lions, meanwhile, went 0-for-2, including an atypical drop from receiver Amon-Ra St. Brown on fourth-and-short. Had the Lions converted, they could’ve built their lead going into halftime. Instead, the Chiefs took advantage by scoring a go-ahead touchdown before the break.

One of Kansas City’s fourth-down conversions was a 6-yard touchdown catch from Xavier Worthy, who beat cornerback Amik Robertson to the flat. Robertson tried to jam Worthy at the line of scrimmage, but the receiver evaded the contact, causing Robertson to lose his balance.

“At the end of the day, man, we’re not about to hold our heads down,” Robertson said. “We’re what, 4-2? It’ll be all right, man. Twenty-four-hour rule, get back to the drawing board. Like I always say, next game is the most important.”

St. Brown said bouncing back quickly from a loss is “mandatory” for the Lions, who hope they can respond in Week 7 like they did in Week 2, when they clobbered the Chicago Bears at home after opening the season with a troubling loss at the Green Bay Packers.

“We will watch the film and we will clean this stuff up. We’re going to have to,” Campbell said. “Tampa Bay is coming in and they’re a good football team. We’re going to have to be ready. … These only get harder and harder as you go. They are more meaningful every game that we go. I go back to this: Maybe we needed this.

“Maybe we needed to get kicked around a little bit, because that’s what happened.”

rsilva@detroitnews.com

@rich_silva18