Table 1.

Recent case reports and studies outlined in this review describing occupational rhinitis since 2018 based upon high molecular weight (HMC) and low molecular weight (LMW) agent.

Causal Agent	Author	Type of study	Year	Number of cases	Occupation	Time of occupational exposure prior to development of symptoms
HMW Agent
Salmon	Lucas et al.	Case report	2022	One case	Salmon-processing plant worker	8 years
Lentil and split pea	Sonday et al.	Case report	2022	One case	Machine operator in factory	1 year
Flour (wheat, multigrain, additives)	Olivieri et al.	Cross-sectional study	2021	727 study participants	Bakers	-
Indigo hair dye (Indigofera tinctoria)	Haltia et al.	Case report	2021	Two cases	Hairdresser	Few months
Psyllium	Jungewelter et al.	Case report	2021	One case	Baker	1 year
Botanical hair dye (Cassia obovata- yellow henna) and (Lawsonia inermis-red henna)	Villalobos et al.	Case report	2020	One case	Hairdresser	<1 year
Buckwheat (Fagopyrum esculentum)	Jungewelter et al.	Case report	2020	Six cases	Bakers, cooks, grocery store worker	2 months to 5 years
Mold enzymes (phytase)	Kuske et al.	Cross-sectional study	2020	8	Meat plant workers	2 weeks to 6 months
Wheat flour	Dubini et al.	Cross-sectional study	2020	1	Baker’s	-
Casein	Nakonechna et al.	Case report	2019	One case	Laboratory worker	12 to 18 months
Gum Arabic	Romita et al.	Case report	2018	One case	Candy factory worker	-
Pork	Jungewelter et al.	Case report	2018	Two cases	Slaughterhouse workers	-
LMW Agent
Persulphate salts	Macan et al.	Systematic Review	2022	42 studies	Hairdressers	-
Cleaning products	da Paz et al.	Cross-sectional study	2022	167 study participants	Cleaning workers	-
Isocyanates	Chemingui	Retrospective study (abstract)	2021	26	Automotive workers (19)	8 ± 5 years
Sodium metabisulphite (SMBS)	Touati et al.	Case report	2020	One case	Coffee factory worker	Years
Diesel engine exhaust emissions (DEEE)	Elopy et al.	Case report	2019	One case	Receptionist	<3 months