Story at-a-glance 1  +. Canine leptospirosis, or âlepto,â is an infection caused by at least four species (serovars) of Leptospira bacteria. 2  However, there are over 20 different serovars that are potentially infectious to dogs.3  Leptospirosis isnât a new disease â in fact, itâs ancient.tory at-a-glance 1  +. Canine leptospirosis, or âlepto,â is an infection caused by at least four species (serovars) of Leptospira bacteria. 2  However, there are over 20 different serovars that are potentially infectious to dogs.
Philip Morris, a London-based cigarette manufacturer, created a New York subsidiary in 1902 to sell several of its cigarette brands, including Marlboro. By 1924 they were advertising Marlboro as a woman's cigarette based on the slogan Mild As May.
If left for too long they will. Cigarettes don&#39 t have an expiration date, but they do go stale and can. Read Expiration Date Cigarettes. marlboro cigarette expiration date how many years we smmoking if prod date is theire. Here&#39 s how to tell if your cigarettes are fresh (I think 6 months is too long and don&#39 t. (Marlboro, Parliament, Virginia Slim, Parliment, Basic, L/M, Bensen & Hedges, Merit). Add 180.