THE White Leghorn is generally considered more resistant to Salmonella infections than some of the heavier breeds of fowl. Hutt and Scholes (1941) reported that the White Leghorn possessed greater genetic resistance to pullorum disease; a view supported in part by Roberts and Card (1935). Garren and Barber (1955) found the White Leghorn more resistant to fowl typhoid (Salmonella gallinarum) than the New Hampshire or Rhode Island Red. The present study was conducted to determine if White Leghorns differ from Rhode Island Reds in their agglutinating antibody response to Sal. gallinarum. Differences in mortality following infection with live cultures of Sal. gallinarum were also considered. PROCEDURE Four separate trials were conducted. The White Leghorns and Rhode Island Reds used in trials 1, 2, and 3 were obtained from a pullorum-clean hatchery. Repeated tests in this laboratory have shown that young Leghorns or Reds from this source do not possess antibodies …
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Garren et al. (1959) studied this question.
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