Prevalence of Mastitis in Dairy Heifers and Effectiveness of Antibiotic Therapy

Abstract

Dairy heifers were treated 0 to 90 d, 90 to 180 d, or 180 to 270 d prepartum with one of five different antibiotic products to determine the best time and with which product they should be treated prior to calving. Two hundred thirty-three heifers were included in the study. At the initial sampling, 56.5% of quarters were infected with some type of organism and 15.4% of quarters were infected with Staphylococcus aureus. Treatments included a cephapirin dry cow product, a penicillin-novobiocin dry cow product, a penicillin-streptomycin dry cow product, an experimental dry cow product containing tilmicosin, and a cephalonium dry cow product not available in the United States. Cure rates for the five antibiotic products indicated that all were equally effective against Staph. aureus and all were significantly more effective than the spontaneous cure rate observed in untreated control quarters. No differences in efficacy were observed due to the different treatment times prepartum. However, fewer new Staph. aureus infections occurred after treatment in the group treated at 180 to 270 d prepartum, indicating that treatment in the third trimester will reduce the chances of new intramammary infections occurring after treatment and persisting to calving.

Nitric oxide concentrations in mammary quarters during heifer mastitis

“…Mastitis in heifers is becoming an important economic problem in dairy herds (Huijps et al, 2009), and prepartum incidence rates are high (39% to 75%; Oliver et al, 2004;Fox, 2009) in different countries, such as the United States of America (Pankey et al, 1991;Owens et al, 2001), Germany (Kromker and Friedrich, 2009), Norway (Waage et al, 1999), Denmark (Aarestrup and Jensen, 1997) and Turkey (Bastan et al, 2010). There is a need for accurate, rapid and inexpensive methods to screen for potential mastitis pathogens.…”

Produksi dan Kualitas Susu Sapi Perah Penderita Mastitis yang Mendapat Pengobatan Antibiotik

“…Menurut Owens et al (2001), pengobatan menggunakan kombinasi antibiotik pencillinstreptomycin menunjukkan tingkat keberhasilan yang tinggi dalam menyembuhkan kasus mastitis pada ternak sapi perah. Penicillin merupakan antibiotik yang dapat membunuh bakteri gram positif (Rismardiati, 1985), sedangkan streptomycin efektif terhadap bakteri gram negatif penyebab mastitis (Suriyasathaporn, 2010).…”

Effect of dry cow therapy on incidence of clinical mastitis,milk yield and composition in crossbred cows

“…Previous studies also reported milk loss due to udder infection in crossbred cows -about 4.8 kg/ day and about 28.8 kg/case (Sharma, 2010) with 552 kg milk loss per lactation (Pal, 2003). Moreover previous studies revealed that Jersey heifers treated with Intramammary antibiotic prepartum produced 531 kg more milk per lactation compared to those without treatment (Oliver et al, 2003 andOwens et al, 2001) Milk composition: Effect of dry cow therapy on milk composition is presented in Table 3. There was no significant difference in milk composition (fat, protein and lactose) between treatment and control groups except that milk SNF and total solids (TS) differed significantly (P<0.05) between treated and control group during 3 rd fortnight only.…”