Final answer:
The claim that HLA-B27 positive individuals may develop reactive arthritis due to temporary disaccharidase deficiency when considering shigellosis is not supported by widely recognized scientific evidence, rendering the statement as likely false.
Step-by-step explanation:
The question of whether individuals who are HLA-B27 positive may mount a reactive arthritis because of temporary disaccharidase deficiency when considering shigellosis is not entirely straightforward. Shigellosis is a gastrointestinal illness caused by Shigella bacteria and can lead to various complications, including reactive arthritis. Reactive arthritis is an autoimmune condition that can develop after certain bacterial infections. While HLA-B27 is associated with a greater risk of developing reactive arthritis, the connection to disaccharidase deficiency is not well-established in scientific literature. Therefore, the statement seems false as it presents a cause that is not widely recognized or proven in the context of HLA-B27 and reactive arthritis.