Preventive and/or ameliorative agent for diseases, stamina enhancement agent, anti-fatigue agent, and pharmaceutical and food and drink using them

A method for preventing and/or ameliorating at least one disease selected from the group consisting of inflammatory disease, allergic disease, and autoimmune disease, the method comprising the step of:

• administering a preventive and/or ameliorative agent comprising at least one of a purple non-sulfur bacteria and a culture material obtained by culturing the purple non-sulfur bacteria, wherein
• the inflammatory disease is at least one disease selected from the group consisiting of inflammatory bowel diseases, inflammatory skin diseases, encephalitis, hepatitis, nephritis, pneumonia, bronchitis, vasculitis, meningitis, thyroiditis, diabetes, inflammatory bile diseases, and cancers involving inflammations,
• the allergic disease is at least one disease selected from the group consisting of Type I allergic diseases, Type II allergic diseases, Type III allergic diseases, Type IV allergic diseases, and Type V allergic diseases,
• the autoimmune disease is at least one disease selected from the group consisting of rheumatoid arthritis, erythematosus, multiple sclerosis, systemic sclerosis, psoriatic arthritis, an infectious disease, and Sjogren's syndrome, and
• the purple non-sulfur bacteria comprises Rhodobacter azotoformans.

The method according to claim 1, wherein

• the Rhodobacter azotoformans comprises the following bacteriological characteristics (1) to (30):
• (1) cell morphology:
• a rod shape or an oval shape;
• (2) polymorphism:
• negative;
• (3) cell size:
• 0.8 μm×1.0 μm;
• (4) the presence or absence of motility:
• positive;
• (5) the presence or absence of spore:
• negative;
• (6) luster in nutrient agar culture:
• positive;
• (7) pigment production in nutrient agar culture:
• positive;
• (8) the presence or absence of surface growth in nutrient broth culture:
• negative;
• (9) the presence or absence of medium turbidity in nutrient broth culture:
• positive;
• (10) liquefaction of gelatin in gelatin stab culture:
• negative;
• (11) coagulation in litmus-milk culture:
• negative;
• (12) liquefaction in litmus-milk culture:
• negative;
• (13) Gram staining:
• negative;
• (14) reduction of nitrate salt:
• negative;
• (15) denitrification:
• negative or positive;
• (16) MR test:
• negative;
• (17) production of indole:
• negative;
• (18) generation of hydrogen sulfide:
• negative;
• (19) hydrolysis of starch:
• negative;
• (20) utilization of citric acid (Christensen):
• negative;
• (21) utilization of inorganic nitrogen source (ammonium salt):
• positive;
• (22) generation of catalase:
• positive;
• (23) generation of oxidase:
• positive;
• (24) anaerobic growth:
• positive;
• (25) O-F test (oxidation/fermentation):
• negative/negative;
• (26) β-galactosidase activity:
• negative;
• (27) arginine dihydrolase activity:
• negative;
• (28) lysine decarboxylase activity:
• negative;
• (29) tryptophan deaminase activity:
• negative;
• and
• (30) gelatinase activity:
• negative.