Drug profile

The FDA adverse-event record for Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str

133 FDA reports name Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#674 of 2,679
by report volume (all drugs)
133
adverse-event reports
18.8%
death-coded share
Cat
most-reported species
Verify with FDA CVM →

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str ranks #674 of 2679 by total reports (133) and #262 of 1130 by death-coded share (18.8%). National dual: Milbemycin Oxime + Spinosad is #1 of 2679 drugs by total adverse-event reports (149,624) at death-coded-share rank 965 of 1130 drugs with at least 50 reports (2.3%); separately, Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) is #1 highest death-coded share at 97.8% (report rank #821).

149,624
Milbemycin Oxime + Spinosad reports (#1)
97.8%
Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) death share (#1)
#674
This drug, reports of 2679
#262
This drug, death share of 1130

Report volume reflects how common a breed or drug is and how often owners and vets file — not actual risk. Death-coded share ranks are limited to entries with enough reports to be meaningful. The two maps do not agree at #1.

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str has 133 reports now versus 133 in that prior snapshot: 0 the same number of (0.0%).

Report change
+0
Death-coded reports
+0
Death-coded share
−0.0 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str changes

Signature read: death-coded report count at 25 is the most distinctive stamp on Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str's FDA AER row.

Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
133
Total Reports
25
Deaths Reported
18.8%
Death-coded share of reports

Active Ingredients

Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str

Administration Routes

Subcutaneous

Species Affected

Cat 133

Most Affected Breeds

Domestic Shorthair 88
Domestic Longhair 9
Siamese 7
Domestic Mediumhair 7
Persian 6
Ragdoll 4
Maine Coon 3
Bengal 2
Cat (other) 2
Norwegian Forest 1

Most Reported Reactions

Lethargy (see also Central nervous system depression in 'Neurological') 75
Anorexia 57
Fever 51
Weight loss 28
Other abnormal test result NOS 25
Vomiting 20
Dehydration 19
Abnormal radiograph finding 17
Febrile 15
Death by euthanasia 15
Anaemia NOS 15
Decreased appetite 15

Outcome Breakdown

Ongoing
69 (50.7%)
Recovered/Normal
37 (27.2%)
Euthanized
15 (11.0%)
Died
10 (7.4%)
Outcome Unknown
5 (3.7%)

Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str: high death-coded share in the FDA AER row

Read these counts as reporting volume, not risk: per our methodology, a widely-prescribed drug will rack up more raw FDA reports in a given year than a rarely-used one at an identical true rate, so we recommend comparing within similar-exposure products rather than across the full 2025 catalog.

High-volume nationwide drug peers

Two openFDA-derived peer sets for Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

Similar death-coded share

Nearest other drugs by death-coded share (18.8% here), distinct from the volume row.

Prebiotics, Microorganisms 18.8% Unspecified Thyroid Medication 18.8% Enrofloxacin 18.7% Lysine 18.7%

What to do with this drug

  • Compare Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str's report volume and death-coded share against similar drugs nationwide. See similar drugs
  • Read how death-coded share differs from a mortality rate before drawing conclusions. Understanding adverse events
  • Browse the full drug directory to compare report counts across products. All drugs

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Feline Calicivirus, Strain F-9, Passage 7, Lot A; Feline Chlamydia Psittaci, Str (#674 of 2,679 by report volume); death-coded 18.8%. PlainBreed drug row · death-coded report count stamp 25 · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →