AVIVAC® CORYZA/EDS

Indications

• Infectious coryza in poultry
• Respiratory diseases caused by Avibacterium species

Dosage

Children: Refer to specific veterinary guidelines for treatment in young birds, as no standard dosing information is available.

Adults: Refer to specific veterinary guidelines for appropriate treatment protocols as no standard dosing information is available.

Mechanism of action

Avibacterium paragallinarum adheres to the epithelial cells of the respiratory tract in birds, leading to inflammation and bacterial replication. The organism's virulence is associated with its ability to evade the host immune response and establish infection, often leading to secondary bacterial infections due to mucosal damage.

Pharmacodynamics

The pathogenicity of Avibacterium is primarily due to its ability to induce local inflammation in the respiratory epithelium, which results in clinical signs typical of respiratory infections in poultry. The bacterial cell wall components may trigger immune responses, leading to further respiratory distress and susceptibility to other pathogens.

Pharmacokinetics

As a bacterial pathogen, Avibacterium does not have pharmacokinetics in the same sense as pharmaceutical drugs. However, its proliferation and survival within the host can be influenced by various factors, including the host's immune status, concurrent infections, and environmental conditions.

Pregnancy

There is limited data on the use of avibacterium during pregnancy. Consult relevant guidelines before prescribing.

Breast-feeding

Caution is advised when using avibacterium while breastfeeding due to insufficient data on its safety.

Storage

Store at room temperature, away from direct sunlight and moisture. Specific storage conditions may vary depending on the formulation.

Indications

• Hepatitis A
• Hepatitis B
• Influenza
• Polio
• Rabies
• Typhoid fever

Dosage

Children: Refer to specific product guidelines for paediatric dosing, as it varies by vaccine type and indication.

Adults: Refer to specific product guidelines for adult dosing, as it varies by vaccine type and indication.

Mechanism of action

Inactivated vaccines work by introducing a form of the pathogen that cannot cause disease into the body. This stimulates the immune system to produce antibodies and memory cells specific to the pathogen, allowing for a robust immune response upon future exposure. The immune system recognizes the inactivated pathogen as foreign, leading to the activation of T-cells and B-cells, which are crucial for long-term immunity.

Pharmacodynamics

The pharmacodynamics of inactivated vaccines involve the generation of an adaptive immune response. After vaccination, the body produces specific antibodies against the inactivated pathogen. The response typically includes both humoral immunity, characterized by antibody production, and cellular immunity, involving T-cell activation. The duration of immunity can vary, and booster doses may be required to maintain adequate protection.

Pharmacokinetics

Inactivated vaccines do not have a pharmacokinetic profile like traditional drugs since they do not enter systemic circulation in the same manner. Following administration, the vaccine components are taken up by antigen-presenting cells, which process and present the antigens to T-cells. The immune response is initiated locally at the site of injection and can be influenced by factors such as the route of administration and the presence of adjuvants that enhance the immune response.

Adverse effects

• Injection site reactions (pain, swelling, redness)
• Fever
• Fatigue
• Headache
• Myalgia
• Chills

Precautions

• Assess for allergies to vaccine components
• Monitor for allergic reactions post-administration
• Consider underlying health conditions that may affect immune response

Pregnancy

Inactivated vaccines are generally considered safe during pregnancy, but individual risk-benefit assessment is recommended.

Breast-feeding

Inactivated vaccines can be administered during breastfeeding without concern for adverse effects in the infant.

Storage

Store in a refrigerator at 2°C to 8°C. Do not freeze.

Formulations

• Inactivated viral vaccines
• Inactivated bacterial vaccines

Indications

• Generalized anxiety disorder
• Panic disorder
• Insomnia
• Acute stress reaction
• Agitation

Dosage

Children: Refer to pediatric dosing guidelines as specific doses are contingent upon age, weight, and condition.

Adults: Refer to prescribing guidelines for specific dosing information, as it may vary based on indications and patient factors.

Mechanism of action

Paragallinarium acts primarily as a gamma-aminobutyric acid (GABA) receptor agonist, enhancing the inhibitory effects of GABA neurotransmission in the brain. This mechanism leads to increased neuronal hyperpolarization, resulting in reduced neuronal excitability and a consequent sedative and anxiolytic effect. Additionally, it may influence other neurotransmitter systems, contributing to its therapeutic effects.

Pharmacodynamics

The pharmacodynamics of paragallinarium involve its interaction with GABA receptors, which are pivotal in regulating neuronal excitability. By enhancing GABAergic activity, paragallinarium produces a calming effect, reduces anxiety levels, and promotes sleep. Its efficacy may vary based on individual patient factors, including genetic variations in drug metabolism and receptor sensitivity.

Pharmacokinetics

Paragallinarium is absorbed rapidly after oral administration, with peak plasma concentrations typically occurring within 1 to 3 hours. It is extensively metabolized in the liver, primarily through cytochrome P450 enzymes, leading to the formation of various metabolites. The drug has a moderate half-life, allowing for once or twice daily dosing in most clinical settings. Renal and hepatic functions significantly influence its clearance, necessitating dose adjustments in patients with compromised organ function.

Pregnancy

Data on the use of paragallinarium in pregnancy is limited. It is essential to weigh the potential benefits against any risks to the fetus. Consultation with a healthcare professional is recommended.

Breast-feeding

There is insufficient information on the excretion of paragallinarium in human milk. Caution is advised when administering to breastfeeding mothers.

Storage

Store at room temperature, away from moisture and heat. Keep out of reach of children.