Document Type : Original Article
Authors
1
Dept. Animal Medicine, Infectious Diseases, Faculty of Veterinary Medicine Damanhour University- Egypt
2
Anim. Med. Dept., Fac. of Vet. Medicine Alexandria University
3
Anim. Med. Dept., Fac. of Vet. Medicine Damanhur University.
Abstract
Epidemiological, clinical and microbiological studies on environmental mastitis were carried out on 100,
3-7 years old cows, 50(peracute, acute, chronic) of them suffering from different forms of clinical
mastitis which divided into two equal groups; applying teat dipping (1st group) and non-applying teat
dipping (2nd group). Other 50 cows were apparently healthy with apparently normal milk and also they
divided into two equal groups; apply teat dipping (3rd group) and non-apply teat dipping (4th group). Our
results showed that peracute, acute and chronic mastitis in 1st group were 8%, 48% and 44%
respectively, while in 2nd group were 16%, 56% and 28% respectively. Percentage of subclinical mastitis
in 3rd and 4th groups were 28.5% and 71.4%. 41 isolates from teat dipping groups (1st and 3rd) and 76
isolates from non-teat dipping group (2nd and 4th) were isolated. Environmental pathogen were E. coli 7,
20 isolates, Enterobacter 4, 8 isolates, Klebsiella 2,3 isolates Str. uberis 10,17 isolates, Str. dysgalactiae
1, 2 isolates respectively. Contagious pathogens were Staph. aureus 10, 16 isolates and Str. agalactiae 6,
5 isolates respectively. Minor micro-organism; C. bovis (1 isolate) from non-teat dipping groups, CN
staph (1 isolate) from teat dipping group and Str. bovis (2 isolates) and Serratia (2 isolates) from non-teat
dipping groups. Staph. aureus, Str. agalactia, C. bovis, Str. Dysagalactia, Str. ubris, Str. epidermids, Str.
bovis and CN staph are more sensitive to danofloxacin, penicillin,andenrofloxacin, while E.coli,
Enterobacter, Klebsiella and Serratia are more sensitive to danofloxacin, gentamycin, kanamycin. We
concluded that, teat dipping is important in controlling environmental mastitis in cows, the environmental
micro-organisms are coliform group (E. coli, Klebsiella and enterobacter), Str. uberis, Str. dysgalactiae,
while contagious micro-organisms are S. aureus and Strept.agalactiae. Penicillin is the most effective
drug in treatment of mastitis in cows.
Keywords
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