MEMORANDUM

Marcus Ruben Ellington, a California state prisoner, appeals pro se from the district court’s judgment dismissing his 42 U.S.C. § 1988 action alleging constitutional violations. We have jurisdiction under 28 U.S.C. § 1291 . We review de novo a dismissal for failure to state a claim, Shwarz v. United States, 234 F.3d 428, 432 (9th Cir.2000), and the entry of summary judgment, Toguchi v. Chung, 391 F.3d 1051, 1056 (9th Cir.2004). We affirm.

The district court properly dismissed Ellington’s Americans with Disabilities Act (“ADA”) claims because the claims were based on inadequate treatment. See Simmons v. Navajo County, 609 F.3d 1011, 1022 (9th Cir.2010) (“The ADA prohibits discrimination because of disability, not inadequate treatment for disability.”).

The district court properly granted summary judgment on Ellington’s deliberate indifference claims because Ellington failed to raise a genuine dispute of material fact as to whether defendants were deliberately indifferent to his medical and mental health needs. See Toguchi, 391 F.3d at 1057-58 (a prison official acts with deliberate indifference only if he or she knows of and disregards an excessive risk to the prisoner’s health and safety; negligence and a mere difference in medical opinion are insufficient).

The district court properly granted summary judgment on Ellington’s retaliation claim because Ellington failed to raise a genuine dispute as to whether defendants solicited inmates to assault him or whether the assault was “because of’ Ellington’s engagement in protected activity. See Rhodes v. Robinson, 408 F.3d 559, 567 (9th Cir.2005) (to establish retaliation, prisoner must demonstrate that the adverse action was taken because of the prisoner’s protected activity).

The district court properly granted summary judgment on Ellington’s failure to protect claim because Ellington failed to raise a genuine dispute as to whether defendants were deliberately indifferent to a substantial risk when they housed him with a Crip-affiliated inmate. See Farmer v. Brennan, 511 U.S. 825, 837, 843-44 , 114 S.Ct. 1970 , 128 L.Ed.2d 811 (1994) (a prison official is not liable for failing to protect one inmate from another unless the prisoner shows that he was housed under conditions that posed a substantial risk of serious harm, and that the prison official acted with deliberate indifference to the prisoner’s safety).

We decline to consider arguments that were not raised in the opening brief or before the district court. See Smith v. Marsh, 194 F.3d 1045, 1052 (9th Cir.1999).

Ellington’s remaining contentions are unpersuasive.

AFFIRMED.

This disposition is not appropriate for publication and is not precedent except as provided by 9th Cir. R. 36-3.