Ruff M D, Reid W M
Avian Dis. 1975 Jan-Mar;19(1):52-8.
The intestinal contents of white Leghorn cockerels were significantly lower in pH in birds infected with Eimeria mivati, E. maxima, or E. necatrix than in uninoculated control birds. The particular Eimeria species used affected the region of the intestine involved, the days (5-9 postinoculation) on which pH decreased, and the magnitude of the decrease. The effects on the magnitude and frequency of pH decrease were as follows: E. mivati, marked in the duodenum and jejunum, variable in the ileum; E. maxima, slight in the duodenum, variable in the jejunum and ileum; E. necatrix, no change in the duodenum, variable in the jejunum and ileum. Infection with E. tenella did not change the intestinal pH. The pH of the gizzard was occasionally higher in birds infected with E. mivati or E. necatrix than in uninoculated control birds. With all four species, on some days the pH in the ceca was higher than in the ceca of controls. These results and previous reports indicate that infection with one of the above four species or with E. acervulina or E. brunetti produces the greatest and most consistent decrease in pH in the region of the intestine where the particular species characteristically produces the severest infection.
感染米氏艾美耳球虫、巨型艾美耳球虫或毒害艾美耳球虫的白来航公鸡的肠道内容物pH值显著低于未接种的对照鸡。所使用的特定艾美耳球虫种类会影响受影响的肠道区域、pH值下降的天数（接种后5 - 9天）以及下降幅度。对pH值下降幅度和频率的影响如下：米氏艾美耳球虫，十二指肠和空肠显著，回肠变化不定；巨型艾美耳球虫，十二指肠轻微，空肠和回肠变化不定；毒害艾美耳球虫，十二指肠无变化，空肠和回肠变化不定。感染柔嫩艾美耳球虫不会改变肠道pH值。感染米氏艾美耳球虫或毒害艾美耳球虫的鸡，其砂囊pH值偶尔高于未接种的对照鸡。对于所有这四种球虫，在某些日子里，盲肠的pH值高于对照鸡的盲肠。这些结果和先前的报告表明，感染上述四种球虫之一、堆型艾美耳球虫或布氏艾美耳球虫会在特定球虫典型地导致最严重感染的肠道区域产生最大且最一致的pH值下降。
