422 CITY MILK SUPPLY 



96. When a case of contagious disease is found among the employees of a 

 dairy producing certified milk under the control of a medical milk commission, 

 such employee shall be at once quarantined and as soon as possible removed from 

 the plant, and the premises fumigated. 



When a case of contagion is found on a certified dairy it is advised that a printed 

 notice of the facts shall be sent to every householder using the milk, giving in detail 

 the precautions taken by the dairyman under the direction of the commission, and 

 it is further advised that all milk produced at such dairy shall be heated at 145F. 

 for 40 min. or 155F. for 30 min., or 167F. for 20 min., and immediately cooled to 

 50F. These facts should also be part of the notice, and such heating of the milk 

 should be continued during the accepted period of incubation for such contagious 

 disease. 



The following method of fumigation is recommended : 



After all windows and doors are closed and the cracks sealed by strips of paper 

 applied with flour paste, and the various articles in the room so hung or placed as to 

 be exposed on all sides, preparations should be made to generate formaldehyde gas by 

 the use of 20 oz. of formaldehyde and 10 oz. of permanganate of potash for every 

 1,000 cu. ft. of space to be disinfected. 



For mixing the formaldehyde and potassium permanganate a large galvanized-iron 

 pail or cylinder holding at least 20 quarts and having a flared top should be used for 

 mixing therein 20 oz. of formaldehyde and 10 oz. of permanganate. A cylinder 

 at least 5 ft. high is suggested. The containers should be placed about in the rooms 

 and the necessary quantity of permanganate weighed and placed in them. The 

 formaldehyde solution for each pail should then be measured into a widemouthed 

 cup and placed by the pail in which it is to be used. 



Although the reaction takes place quickly, by making preparations as advised all 

 of the pails can be "set off" promptly by one person, since there is nothing to do but 

 pour the formaldehyde solution over the permanganate. The rooms should be kept 

 closed for 4 hr. As there is a slight danger of fire, the reaction should be 

 watched through a window or the pails placed on a non-inflammable surface. 



97. Following a weekly medical inspection of the employees, a monthly 

 report shall be submitted to the secretary of the medical milk commission, on the 

 same recurring date by the examining visiting physician. 



The following schedule, filled out in writing and signed by himself, is recommended 

 as a suitable form for the attending physician's report : 



This is to certify that, on the dates below indicated, official visits were made to the 



dairy, owned and conducted by of (indicating town and State), 



where careful inspections of the dairy employees were made. 



(a) Number and dates of visits since last report. . 



(g) Number of men employed on the plant. . 



(c) Has a recent epidemic of contagion occurred near the dairy, and what was its 

 nature and extent? . 



(d) Have any cases of contagious or infectious disease occurred among the men 

 since the last report? . 



(e) Disposition of such cases. . 



(/) What individual sickness has occurred among the men since the last report? 



(0) Disposition of such cases. . 



(h) Number of employees now quarantined for sickness. . 



(i} Describe the personal hygiene of the men employed for milking when prepared 

 for and during the process of milking. . 



