Section 23. Each and every physician located or practicing in any of the said cities who shall know that any person whom he or she is called upon to visit, or who comes or is brought to him or her for examination, is suffering from, or is afflicted with cholera, smallpox, (variola or varioloid) diphtheria, diphtheritic croup, membraneous croup, scarlet fever, typhoid fever, typhus fever, yellow fever, epidemic cerebro-spinal fever, relapsing fever, or leprosy, shall forthwith make report in writing, or upon blanks to be furnished for that purpose, to the Bureau of Health of the city in which said person may be located, which said report shall over his or her own signature state the name of the disease, and the name, age and sex of the person suffering therefrom, and shall also set forth by street and number, or otherwise sufficiently designate the house, room or other place in which said person may be located, together with such other information relating thereto as may be deemed important by said bureau. Upon receipt by the Bureau of Health of a report of the existence of a case of cholera, smallpox (variola or varioloid) scarlet fever, typhus fever, yellow fever, relapsing fever, diphtheria, diphtheritic croup, membraneous croup, or leprosy, in said city, it may at once place, or cause to be placed, in a conspicuous place or places upon or near the house or premises in which said case may be located, a placard or placards upon which shall be printed in large letters the name of the disease from which the person or persons in said house or premises may be suffering as aforesaid, as the case may be: Provided, That variola or varioloid shall be placarded as "smallpox," and that diphtheritic croup and membraneous croup shall be placarded as "diphtheria," and said placard or placards shall remain thereon until such time as the rules and regulations established by the said Bureau of Health regarding the destruction or disinfection of infected bedding, clothing or other articles which have been exposed to infection, and the disinfection of houses and premises shall have been fully complied with: Provided, That in addition to the placarding aforesaid, or in lieu of the same the said Bureau of Health may place a guard or guards upon said houses or premises. If any person or persons shall deface, alter, mutilate, destroy, or tear down any such placard, without the permission of the said Bureau of Health, such person or persons shall be liable for each offense to a penalty of not less than five nor more than twenty dollars, which may be recovered by summary proceedings before the mayor or any alderman or police magistrate in any of such cities.