Table 2 Characteristics and outcomes of infection episodes.

From: Infectious complications of bispecific antibody therapy in patients with multiple myeloma

Characteristic

Detail (n = 111)

Treatment course

BsAb cycles at time of infection (median, IQR)

2 (1–7)

Cumulative prednisone-equivalent dose, 30 days (mg; median, IQR)

266.7 (106.7–266.7)

Lowest neutrophil level, 14 days prior (x109/L; median, IQR)

1.8 (1.1–2.3)

Lowest lymphocyte count, 14 days prior (x109/L; median, IQR)

0.3 (0.1–0.7)

Prophylaxis (n, %)

Antiviral

Valaciclovir: 104 (94)

Valganciclovir: 3 (3)

Famciclovir: 3 (3)

None: 1 (1)

Antifungal

Fluconazole: 9 (8)

Mould-active antifungal: 29 (26)

 Posaconazole: 24 (22)

 Voriconazole: 5 (5)

None: 73 (66)

 P. jirovecii prophylaxis

Trimethoprim/Sulfamethoxazole: 104 (94)

Dapsone: 5 (5)

None: 2 (2)

Infection details

Number of patients (n, %)

35 (90)

Grade of infection

1: 37 (33)

2: 50 (45)

3: 22 (20)

4: 0 (0)

5: 2 (2)

Infection category!

MDI: 33 (30)

CDI: 43 (39)

FUF: 35 (32)

Site of infection

Respiratory: 46 (41)

Urinary: 4 (4)

Bloodstream: 6 (5)

Skin and soft tissue: 4 (4)

Gastrointestinal tract: 8 (7)

Ear nose and throat: 6 (5)

Genital: 2 (2)

CRS: 31 (28)

Unknown: 4 (4)

Pathogen details (n, %)

Pathogens isolateda

Bacterial: 15 (39)

 Gram Negative: 12 (32)1

 Gram Positive: 3 (8)2

Viral: 22 (58)

Respiratory viruses: 15 (39)3

Reactivated viruses: 7 (18)4

AFB: 1 (3)5

Treatment and outcomes

Total antibiotic duration (days; median, IQR)

 IV

 PO

5 (3–9)

3 (3–4)

5 (5–10)

Hospital admission (n, %)

63 (57)

Outcome at 30 days (n, %)

Survival: 108 (97)

Death: 3 (3)6

  1. !MDI microbiologically diagnosed infection, CDI clinically diagnosed infection, FUF fever of unknown focus.
  2. aThere were 2 pathogens isolated in 5 infective episodes: adenovirus & EBV, Haemophilus influenza & rhinovirus, influenza & adenovirus, S. aureus & E. coli, Bordetella parapertussis & rhinovirus/enterovirus.
  3. 1Salmonella sp. (n = 3), Bordetella parapertussis (n = 1), Escherichia coli (n = 3), Pseudomonas aeruginosa (n = 1), Haemophilus influenzae (n = 2), Klebsiella pneumoniae (n = 1), Proteus mirabilis (n = 1).
  4. 2Clostridium difficile (n = 1), Enterococcus faecalis (n = 1), Staphylococcus aureus (n = 1).
  5. 3Rhinovirus/enterovirus (n = 8), influenza (n = 1), adenovirus (n = 4), COVID-19 (n = 2).
  6. 4BK virus (n = 1), cytomegalovirus (n = 4), herpes simplex virus 2 (n = 1), Epstein Barr virus (n = 1).
  7. 5Mycobacterium avium complex (n = 1).
  8. 6Deaths attributed to preceding infection within 30 days.