So here's another idea of mine that I wrote up. Though I feel its pretty good as-is, I still think it could use a bit of polish.
Item #: SCP-XXX
Object Class: Euclid
Special Containment Procedures: Isolated samples of SCP-XXX is to be contained within 5 vials and cryogenically frozen in the Infectious Agents R&D facility in Lab ███ under security level 2. All individuals infected with SCP-XXX are to be quarantined at Sector ████ under security level 5 to be incinerated. All research on SCP-XXX is to be done under the supervision of the Infectious Agents Research Administrator.
Description: SCP-XXX is a species of bacterium of the genus ██████████, with a 100% infection rate, but a 0% mortality rate. The bacterium thrives in moist environments, but especially in the bodily fluids of plants and mammals, particularly humans, and is the only disease known that spreads via phytonosis (plant-to-animal infection). This strain can be passed from plants to animals via ingestion or direct skin contact with plant oils or juices. Treatment is possible, but no cure is known as of now.
After a plant is infected by SCP-XXX, usually by absorbing dormant bacteria in groundwater, it undergoes a rapid transformation: flowers will become more pungent and leaves become thicker and suppler. More obvious changes are prevalent in fruits and vegetables, which become richer in color and taste, though nutritional content and size are not affected in any way. Infected plants have no psychological effect on humans or other animals, though the aroma produced by infected fruits is described as “very tempting”. Cooking does nothing to kill the bacteria.
Around 24 hours prior to infection, subjects will begin to experience hair loss, extreme thirst, a lack of appetite, and a strong desire to stay outdoors in the sun. Subjects will often spend entire days just sitting or lying down outside, reacting violently but sluggishly when others attempt to forcibly move them. 48 hours after infections, skin takes on a greenish tinge, and pores enlarge as green stems begin to emerge from the victim’s flesh. Roots will emerge from the legs, groin and buttocks to take nutrients from the soil upon which the subject sits, and the subject has great difficulty moving due to plant tendrils growing through multiple layers of tissue, though their arms are free to move. The digestive system shuts down and atrophies as the plant growing in them shares whatever nutrients they acquire with its host. Orifices are mostly untouched, though eyes become waxy in appearance.
Within a week, almost all of the subjects body is covered with growing plants, all of which being the species of whatever plant(s) they have consumed. These plants typically flower in two weeks and bear fruit in three weeks, regardless of species. All fruits and vegetables that grow on infected subjects are they themselves infected with SCP-XXX. Long-infected subjects become lethargic and unwilling to cooperate with others, desiring only to sit outside to “let themselves grow”, as one infected subject put it (see Addendum), as well as constantly demanding water. Subjects act with great hostility towards any attempts to trim or prune them.
Addendum: The following is an interview conducted by Dr. ██████-████ on a subject infected by SCP-XXX from ingesting an infected tomato, henceforth to be referred to as “Subject XXX-15”.
Subject information: Subject is ██ year old Hispanic female, height ██’█’’, weight ███ lbs. Infected with SCP-XXX for five weeks.
Dr. ██████-████: How do you feel, madam?
Subject XXX-15: Thirsty. Water please.
Dr. ██████-████: Are you in any pain at all?
Subject XXX-15: Water. I want some water.
Dr. ██████-████: Please answer the question first.
Subject XXX-15: Give me water. I’m thirsty.
Dr. ██████-████: Please answer the question.
Subject XXX-15: Thirsty.
(this goes on for several minutes until researchers provide Subject XXX-15 with water)
Dr. ██████-████: Feeling better?
Subject XXX-15: I feel great.
Dr. ██████-████: Now, if you please answer the question: are you in any pain?
Subject XXX-15: I feel great. The sun is wonderful.
Dr. ██████-████: Does it hurt when I do this?
(Dr. ██████-████ reaches over and plucks a leaf from a vine growing out of Subject XXX-15’s arm)
Subject XXX-15: *groaning*
Dr. ██████-████: Did you feel that?
Subject XXX-15: *groaning* Hungry.
Dr. ██████-████: What?
Subject XXX-15: Are you hungry?
Dr. ██████-████: You can ask me questions later, madam. If you please-
(Subject XXX-15 immediately rips a tomato from her side and throws it at Dr. ██████-███’s face)
Dr. ██████-████: *screaming* MY EYES! IT’S IN MY EYES! GET IT OUT! GET IT OUT!
Subject XXX-15: Thirsty…
(From here the interview was immediately halted. Subject XXX-15 was put back into quarantine while Dr. ██████-████ was subjected to immediate treatment.)
Addendum A-1: Dr. ██████-████ is currently placed in quarantine. He is not to be removed until further notice.