| changes in antibody titres against leishmania infantum in naturally infected dogs in southern spain. | monthly serological follow-up of the antibody titres against leishmania infantum in hunting dogs in rural southern spain was carried out during the transmission period (from april to october in 1996). titres > or = 160 were regarded as indicating disease, while lower positive tires were also recorded as 'seropositive'. over this period, a significant (p < 0.05) increase in the percentage of dogs with a titre > or = 160 was observed; from 12.6% in april to 19.2% in october. the same pattern was o ... | 1998 | 9566089 |