Gesundheit für Mensch, Tier & Pflanze

BHV1 (IBR/IPV/IBP)

Bovine Herpes Virus 1

C D E

Profile

The pathogen, Bovine Herpes Virus 1 (BHV-1), causes different diseases in cattle: Infectious Bovine Rhinotracheitis (IBR), Infectious Pustular Vulvovaginitis (IPV), and Infectious Balanoposthitis (IBP). There is no risk of infection to humans.

Occurrence

worldwide

Host animals

The main hosts are cattle. Natural infections (but usually without clinical manifestations) have been reported in sheep and goats. Wild ruminants also appear to be susceptible to BHV-1 infection.

Infection route

Transmission occurs through direct contact from animal to animal. Indirect transmission through persons and contaminated clothing, transport vehicles, equipment (stable utensils) is also possible.

Incubation period

2 to 6 days

Symptomatology

Infection with bovine herpes virus 1 manifests itself in two forms: As IBR (= respiratory form) with, among other things, dullness, reluctance to eat, fever (up to 42 °C), nasal discharge, cough or as IPV / IBP (= genital form).

Therapy

There is no therapy

Prevention

IBR/IPV/IBP is a notifiable animal disease. In case of suspicion of disease, the legal requirements must be followed. Vaccination is prohibited in Austria.

Situation in Austria

On June 12, 2022, four imported cattle were found to be infected with IBR/IPV during recruitment examinations at a farm in Lower Austria. The infected animals are slaughtered in accordance with animal welfare regulations, further investigations in the herd are ongoing. No other Austrian farms are affected.

Austria has been officially recognized free of IBR/IPV since 1999. To maintain this status, surveillance programs are carried out annually in accordance with the requirements of Directive 64/432/EEC and national legislation.

BHV1-Tests in Austria

Specialized information

The pathogen, Bovine Herpes Virus 1 (BoHV-1) with various subtypes, is a double-stranded DNA virus and belongs to the Herpesviridae family. Introduction of the pathogen into BHV1-free farms usually occurs through the purchase of animals that are clinically healthy but carry the virus latently or are in the incubation phase. The spread of the disease is promoted by intensive animal movement through, for example, livestock traders and livestock markets. The pathogen is spread in the herd mainly by direct animal contact, e.g. via pathogen-containing tear and nasal secretions (droplet infection), via the mucous membranes of the genital tract, but also via feces. Indirect transmission through persons and contaminated clothing, through insufficiently cleaned, contaminated transport vehicles, equipment (stable utensils) and instruments (e.g. injection needles) is also possible. Infected animals remain virus carriers for life and can become excretors again in phases after a stressful situation (e.g. change of feed, birth, transport, stress). Nasal virus excretion lasts up to 2 weeks. Male animals play an important role in the spread of IBR/IPV/IBP (sending infected semen!). Affected cattle show serologically detectable antibodies 7-14 days after infection. Maternal antibodies are transmitted via colostrum to the calves, which thus have a biological protection against clinical disease. They are usually detectable until 9 months of age, in a few cases longer. Small ruminants can become infected, excrete the virus, but show no symptoms of disease. Wild ruminants form a virus reservoir in BHV-1 areas.

Symptomatology

There are two forms of BHV-1 infection, the symptoms of which vary according to the age of the infected animals:

IBR = respiratory form: Dullness, reluctance to eat, fever (up to 42 °C), nasal discharge, hyperemia of the mucous membranes of the nose and fauces ("red nose symptom"), conjunctivitis, cough, dyspnea, abortion. Fattening animals show decreased fattening performance. Lactating animals show a severe decrease in milk yield early in the disease. In calves, IBR progresses primarily as a febrile general disease with dominance of respiratory symptoms and often diarrhea. The lethality is significantly higher than in adult animals.

IPV/IBP = genital form (usually confined to the vaginal and preputial mucosa): dullness, reluctance to feed, fever (up to 42 °C), labia swollen and edematous, mucosa (vestibule, vagina, penis) hyperemic, vesicles on the mucosa, abortion, orchitis, endometritis.

Diagnostic

Sample material for indirect detection (ELISA, serum neutralization test):

  • Whole blood or serum without anticoagulant (not frozen, filling volume > 7ml).
  • Tank milk or single milk

Sample material for direct detection (PCR, virus cultivation)

  • Nasal swab, eye swab, genital swab
  • Head incl. tonsils and larynx
  • esophagus 20 cm

altered organs:

  • fist-sized piece of lung
  • Lymph nodes
  • Uterus, ovaries
  • organs from fetus and placenta

Contact

Institut für veterinärmedizinische Untersuchungen Mödling

automatically translated

Jump to top
X

We are using cookies.

We are using cookies on this web page. Some of them are required to run this page, some are useful to provide you the best web experience.

Word-Dokument generieren

Bitte wählen Sie die gewünschten Inhalte aus: