Stampi S, Varoli O, de Luca G, Zanetti F
Institut für Hygiene, Universität Bologna, Italien.
Zentralbl Hyg Umweltmed. 1992 Oct;193(3):199-210.
Monitoring of "thermophilic" campylobacters in a sewage treatment plant in Bologna (Italy) has shown that incoming sewage contained a most probable number of 1630 campylobacters/100 ml. The secondary treatment in activated sludge tanks reduced 98.61% of campylobacters, 95.32% of fecal coliforms, 96.46% of fecal streptococci, 93.36% of salmonellas and 93.01% and 88.29% of BOD5 and COD respectively. Subsequent tertiary treatment with 3 ppm of chlorine dioxide for 15 min reduced 100% of campylobacters and salmonellas. Significant correlation coefficients were found in incoming sewage between campylobacters and salmonellas (p < 0.01) and between campylobacters and fecal coliforms (p < 0.02). Campylobacter jejuni and Campylobacter coli constituted 51.3% and 48.7% respectively of the 80 strains isolated. In incoming sewage 66% of the strains isolated were found to be Campylobacter jejuni whereas Campylobacter coli strains were prevalent in activated sludge effluent (69.7%). The greatest frequency of isolation and the higher counts were obtained during the Spring to Summer period with distinct peaks in May, June and July. This seasonability is probably due to the seasonal variation of campylobacter infections in man and animals.
对意大利博洛尼亚一家污水处理厂中的“嗜热”弯曲杆菌进行监测发现，进厂污水中弯曲杆菌的最可能数为每100毫升1630个。活性污泥池中的二级处理使弯曲杆菌减少了98.61%，粪大肠菌群减少了95.32%，粪链球菌减少了96.46%，沙门氏菌减少了93.36%，生化需氧量（BOD5）和化学需氧量（COD）分别减少了93.01%和88.29%。随后用3 ppm二氧化氯进行15分钟的三级处理使弯曲杆菌和沙门氏菌减少了100%。在进厂污水中，弯曲杆菌与沙门氏菌之间（p < 0.01）以及弯曲杆菌与粪大肠菌群之间（p < 0.02）发现了显著的相关系数。在所分离出的80株菌株中，空肠弯曲杆菌和结肠弯曲杆菌分别占51.3%和48.7%。在进厂污水中，所分离出的菌株66%为空肠弯曲杆菌，而结肠弯曲杆菌菌株在活性污泥流出物中占主导（69.7%）。在春季至夏季期间分离频率最高且数量较多，在5月、6月和7月出现明显峰值。这种季节性可能是由于人和动物中弯曲杆菌感染的季节性变化所致。
